The Workplace Wellness Nutrition Guide – Corporate Licence | Tracey Warren Nutrition

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Corporate Licence – Share with Your Whole Team

THE WORKPLACE
WELLNESS
NUTRITION GUIDE

This guide is licensed for use across your entire organisation. Share it with every employee – no restrictions on numbers.

For HR managers and business owners Share directly with employees Menopause in the workplace Desk workers and shift workers

Two guides in one

A section for HR and leadership – and a section to share directly with your team

Tracey Warren
TW

Tracey Warren

Naturopathic Nutritional Therapist

Workplace wellness is one of the most under-resourced areas in UK business. Organisations invest in standing desks, EAP programmes and mental health first aiders – but almost nobody addresses the single biggest driver of energy, focus, mood and resilience at work: what people eat.

“You cannot expect high performance from people who are running on caffeine, biscuits and skipped lunches. This guide gives you the practical knowledge to change that – without a big budget or a full-time wellness team.”

Part One
For HR Managers and Business Owners
The business case, what to look for and what you can do without a big budget
01
The Business Case for Workplace Nutrition
The numbers are impossible to ignore

Poor nutrition in the workplace costs UK businesses billions every year in lost productivity, absenteeism and presenteeism – employees who are physically present but mentally and physically unable to perform at their best. The research is consistent and clear.

20%
Productivity loss linked to poor diet and nutrition at work
£1,500
Average annual cost per employee of presenteeism driven by poor health
14m
Working days lost to stress, depression and anxiety annually in the UK
1 in 4
UK employees report regularly skipping lunch at their desk
900k
Women in the UK leave the workforce early due to unmanaged menopause symptoms
3x
More likely to be engaged at work when employers support health and wellbeing

Your people’s nutrition is a business issue.
Not just a personal one.

What poor workplace nutrition looks like

The 3pm productivity cliff

A predictable daily dip in focus, energy and output driven by blood sugar crashes from poor lunch choices or no lunch at all. Costs organisations hours of effective output every single day.

Chronic fatigue and presenteeism

Employees who are physically present but mentally absent. Difficult to measure but estimated to cost twice as much as absenteeism. Poor diet is a primary driver.

High cortisol and poor decision-making

Chronic stress combined with poor nutrition elevates cortisol which directly impairs judgement, emotional regulation and creative thinking. Your leadership team is not immune.

Menopause-related attrition

Around 900,000 women have left the UK workforce due to unmanaged menopause symptoms. Many more remain but are significantly underperforming compared to their potential.

02
What HR and Leadership Can Do
Practical actions that do not require a large budget

You do not need a corporate wellness programme or a big budget to make a meaningful difference. The most impactful changes are often the simplest ones.

01
Protect lunch breaks. Make it a cultural expectation.
  • One in four UK employees regularly skips lunch. Leadership behaviour sets the norm.
  • Model the behaviour from the top – managers who eat at their desks signal that lunch breaks are not acceptable
  • Avoid scheduling meetings over the core lunch window where possible
  • A 30-minute proper break increases afternoon productivity significantly – it is not lost time
02
Review what you offer in the office or canteen.
  • Remove or reduce ultra-processed snacks from meeting rooms and communal areas
  • Replace biscuit tins with mixed nuts, fruit and dark chocolate – the cost difference is minimal
  • If you provide catering, ensure protein-rich options are always available at lunch
  • Provide a water cooler or encourage water bottles – dehydration is the most common and most overlooked cause of afternoon fatigue
03
Implement a menopause policy and support framework.
  • The Menopause Employment Protection Bill has raised the profile of this issue significantly
  • A simple menopause policy signals to female employees that their experience is understood
  • Flexible working, temperature control and access to cold water are low-cost reasonable adjustments
  • Train line managers to have sensitive, informed conversations about menopause at work
04
Share practical nutrition education with your team.
  • Share this guide with your employees – the second half is written directly for them
  • Consider a lunch and learn session on workplace nutrition – one hour, significant impact
  • A quarterly wellbeing newsletter with practical nutrition content costs nothing and builds culture
  • Signpost employees to accessible, affordable resources rather than expensive programmes
05
Measure and acknowledge the impact.
  • Include nutrition and energy questions in staff surveys to establish a baseline
  • Track sickness absence before and after wellbeing initiatives
  • Celebrate and share wellbeing wins alongside business results – it signals that people matter
  • ROI on wellbeing investment averages £5 returned for every £1 spent according to CIPD research
HR Workplace Nutrition Checklist
Lunch breaks are protected and modelled by leadership
Communal areas offer at least one genuinely nutritious snack option
Water is freely available and employees are encouraged to drink it
A menopause policy is in place or in development
Line managers have received basic awareness training on menopause
Nutrition education has been shared with the team
Catering or canteen provision includes high protein lunch options
Wellbeing is measured in staff surveys at least annually
Part Two
For Employees
Share this section directly with your team. Practical, honest and designed to make an immediate difference.
03
Energy and Focus at Work
Why you crash at 3pm – and how to stop it

The 3pm energy slump is so common in workplaces that most people think it is normal. It is not. It is a direct consequence of what was eaten – or not eaten – earlier in the day.

1
Eat breakfast before you leave home. Every day.
  • Skipping breakfast causes blood sugar to drop within 2-3 hours, triggering cortisol and fatigue
  • A high protein breakfast – eggs, Greek yoghurt, smoked salmon – keeps you stable until lunch
  • A cereal bar or toast alone will spike and crash you before 10am
2
Make your lunch count. Protein and vegetables – every time.
  • A high carb lunch (pasta, sandwich on white bread, meal deal with crisps) causes the 3pm slump
  • Aim for at least 20-25g protein at lunch – chicken, fish, eggs, lentils, Greek yoghurt
  • Add vegetables or salad to increase fibre and stabilise energy for the afternoon
  • Eat away from your desk if possible – even 15 minutes of genuine break improves afternoon focus
3
Drink water constantly. Not just when you are thirsty.
  • Thirst is a late signal – by the time you feel thirsty you are already mildly dehydrated
  • Even 1-2% dehydration reduces cognitive performance, concentration and mood significantly
  • Aim for 2 litres across the working day – a 750ml bottle on your desk refilled twice
  • Herbal tea and sparkling water count. Caffeine after 12pm does not help – it disrupts sleep which makes tomorrow worse
What to eat at your desk when you are busy
Choose ThisInstead of ThisWhy
Mixed nuts and dried fruitBiscuits or chocolate barProtein and healthy fat vs sugar spike and crash
Greek yoghurt potFlavoured yoghurt or cereal bar18-20g protein vs mostly sugar. No comparison.
Oatcakes with nut butterCrackers or rice cakes aloneSlow release energy vs quick spike with no protein
Hard boiled eggs (2 pack)Pastry or sausage rollComplete protein vs refined carbs and poor quality fat
Dark chocolate 70% (2-3 squares)Milk chocolate or sweetsMagnesium and antioxidants vs pure sugar
Sparkling water or herbal teaEnergy drink or fourth coffeeHydration vs blood sugar spike followed by deeper crash
04
Stress, Cortisol and Food
The connection most people do not know about

Chronic workplace stress is not just a mental health issue. It directly affects what you eat, how your body processes food and where it stores fat. The relationship between stress and nutrition runs in both directions.

What high cortisol does to your eating

Cortisol – the stress hormone – increases cravings for sugar and refined carbs, reduces satiety signals so you feel less full, and drives fat storage directly to the abdomen. Stress eating is physiological, not weakness.

What skipping meals does to your cortisol

Skipping meals raises cortisol further. It is a vicious cycle – stress makes you skip meals, skipping meals raises stress hormones, which makes you more stressed and more likely to reach for sugar.

Foods that actively reduce cortisol

Dark leafy greens (magnesium), oily fish (omega-3), berries (antioxidants), dark chocolate 70%+ (magnesium and flavonoids), and fermented foods (gut-brain connection). These are not wellness trends – they are evidence-based.

Foods that worsen cortisol response

Caffeine in excess, alcohol, refined sugar and ultra-processed food all elevate cortisol and worsen the stress response. Reducing these during high-pressure periods is more effective than many people realise.

Key
The three most important things during a stressful period at work
  • Do not skip meals – it raises cortisol and makes everything harder
  • Reduce caffeine after 12pm – it elevates cortisol and disrupts the sleep that stress already damages
  • Eat at least one genuinely nutritious meal per day – even if everything else goes wrong
05
Menopause in the Workplace
For women experiencing symptoms and the managers who support them

Around 4.5 million women aged 45-55 are currently in work in the UK. The majority are navigating perimenopause or menopause symptoms while doing their jobs. What most of them have never been told is that what they eat every day directly influences how severe those symptoms are.

Hot flushes during meetings

Triggered by blood sugar spikes from caffeine and refined carbs. A protein-rich lunch and reducing afternoon caffeine significantly reduces frequency.

Practical fix: Protein at every meal. No caffeine after 12pm. Reduce sugar.

Brain fog and poor concentration

Oestrogen decline affects cognitive function. Omega-3 rich foods – oily fish, walnuts, flaxseed – directly support brain function and are the most important foods at this stage.

Practical fix: Oily fish twice a week. Walnuts at your desk. Ground flaxseed daily.

Exhaustion that does not respond to sleep

Progesterone decline disrupts sleep architecture. Magnesium glycinate before bed, reducing caffeine after 12pm and eating enough throughout the day all make a measurable difference.

Practical fix: Magnesium glycinate 300mg before bed. Eat regularly. No caffeine after noon.

Anxiety and mood changes

Oestrogen decline reduces serotonin production. A gut-supporting diet rich in diverse plant foods, fermented foods and omega-3 directly supports mood stability.

Practical fix: Greek yoghurt, kefir or sauerkraut daily. Reduce alcohol. Eat regularly.

Weight gain around the middle

Hormonal changes shift fat storage to the abdomen. Protein intake and blood sugar stability are the two most powerful dietary responses – not eating less.

Practical fix: 25-30g protein at every meal. Reduce refined carbs. Do not skip meals.

Joint pain and physical discomfort

Oestrogen is anti-inflammatory. As it declines, inflammation rises. An anti-inflammatory diet is not optional during this transition – it is essential.

Practical fix: Oily fish, berries, turmeric, leafy greens daily. Reduce alcohol and sugar.

For a comprehensive menopause nutrition guide that employees can access independently, see the Managing Menopause Through Food guide at traceywarrennutrition.co.uk

06
Nutrition for Desk Workers
Specific challenges – and specific solutions

Desk workers face a unique set of nutritional challenges. Sedentary for most of the day, screen-fatigued by afternoon, snacking out of boredom or stress rather than hunger, and often with no proper break from their desk.

Sitting all day and blood sugar

Physical inactivity makes blood sugar spikes more severe and longer lasting. A short walk after lunch – even 10 minutes – measurably improves blood sugar control and afternoon focus.

Screen fatigue and food choices

Decision fatigue from screen work depletes the mental energy needed to make good food choices. Pre-preparing lunch and having good snacks already at your desk removes the need for willpower.

Eating at the desk

Eating while working means you eat faster, register fullness less accurately and eat more overall. Even a 15-minute break from your screen at lunch makes a significant difference to how much you eat and how well you feel after.

Chronic dehydration

Office environments are dry, air-conditioned and full of caffeine. Most desk workers are mildly dehydrated for most of the working day. Brain fog, headaches and poor concentration are often just thirst.

The desk worker’s daily quick wins
1
Water on your desk
750ml bottle. Fill it twice. Drink before you feel thirsty.
2
Protein at lunch
Chicken, tuna, eggs, lentils. Every single day without exception.
3
No caffeine after 12
Switch to herbal tea. Sleep better. Feel better tomorrow.
4
Walk after lunch
10 minutes. Measurably improves blood sugar and afternoon focus.
5
Good snacks at your desk
Nuts, dark chocolate, oatcakes. Remove the need for willpower.
6
Leave your desk at lunch
Even 15 minutes. Eat consciously. Register fullness properly.
07
Nutrition for Shift Workers
Nurses, care workers, factory staff, security, hospitality

Shift work is one of the most nutritionally demanding working patterns. Disrupted sleep, irregular meal times, limited food options during shifts and the physical and mental demands of the work itself create a perfect storm of poor nutrition outcomes.

1
Eat to your shift pattern – not the clock.
  • Your body does not know what time it is – it responds to when you eat relative to when you sleep and work
  • For night shifts, eat a proper meal before your shift starts and a lighter meal mid-shift
  • Avoid large meals within 2-3 hours of sleep regardless of what time that is
  • Keep a protein-rich snack for the lowest energy point of your shift – usually 3-5am for night workers
2
Manage caffeine strategically – not constantly.
  • Caffeine is useful for shift workers but needs to be timed carefully
  • Use caffeine at the start of a shift for alertness – not throughout to maintain energy
  • Stop caffeine consumption at least 6 hours before your planned sleep window
  • Hydration is more important than caffeine – dehydration causes more fatigue than most people realise
3
Prepare food in advance. Options disappear on a shift.
  • Vending machines, hospital canteens and late-night petrol stations offer very poor nutritional options
  • Batch cook on days off and portion into containers for each shift
  • Keep emergency staples in your bag – mixed nuts, protein bars (20g+ protein), oatcakes
  • A thermos of homemade soup or a cold rice pot is far better than anything available mid-shift
4
Protect your gut health. Shift work disrupts it significantly.
  • Irregular eating patterns directly disrupt the gut microbiome and circadian rhythm
  • Include fermented foods daily – Greek yoghurt, kefir, sauerkraut – to support gut bacteria
  • Aim for 30 different plant foods per week – even small amounts count
  • Magnesium glycinate helps with sleep quality regardless of when sleep occurs
08
Mental Health and Food
The gut-brain connection every employer needs to understand

Around 95% of serotonin – the neurotransmitter most associated with mood, wellbeing and emotional regulation – is produced in the gut. The connection between what we eat and how we feel mentally is not metaphorical. It is physiological, direct and measurable.

The gut-brain axis

The gut and brain are in constant two-way communication via the vagus nerve. The state of your gut microbiome directly influences anxiety levels, mood stability, stress resilience and cognitive function.

Ultra-processed food and mental health

Multiple large-scale studies now link high ultra-processed food consumption with increased rates of depression and anxiety. The mechanism is gut dysbiosis, chronic inflammation and nutrient depletion.

Nutrients most commonly deficient in depression

Omega-3 (oily fish, walnuts), Vitamin D (sunlight, oily fish, eggs), Magnesium (dark leafy greens, seeds), B vitamins (whole grains, meat, eggs), Iron (particularly in women). Deficiencies in these are common and impactful.

Blood sugar and anxiety

Blood sugar crashes feel physically similar to anxiety – racing heart, sweating, difficulty concentrating. Many people experience what they believe is anxiety that is partly driven by blood sugar instability from poor eating patterns.

Key
The five most important foods for mental health at work
  • Oily fish twice a week – omega-3 is the most evidence-backed nutritional intervention for mood
  • Fermented foods daily – Greek yoghurt, kefir, sauerkraut to support the gut-brain axis
  • Dark leafy greens daily – magnesium supports the nervous system and reduces anxiety
  • Berries – anthocyanins reduce neuroinflammation which is increasingly linked to depression
  • Regular eating – blood sugar stability is the foundation of emotional regulation
09
Supplements for Focus and Concentration
Food first. Always. But these have strong evidence behind them.

The supplement industry is full of overclaiming. This section covers only those with genuine, consistent evidence for cognitive performance, focus and energy at work. None of these replace a good diet – but for people who are eating well and still struggling, they can make a meaningful difference.

1
Magnesium Glycinate – 300mg before bed
  • The most deficient mineral in the UK adult population and one of the most impactful for cognitive function
  • Magnesium directly supports memory, learning, stress regulation and sleep quality
  • Poor sleep is the single biggest driver of poor workplace performance – magnesium glycinate consistently improves sleep depth
  • Glycinate form is best absorbed and gentlest on the stomach. Avoid magnesium oxide – it is poorly absorbed.
2
Omega-3 (EPA and DHA) – 1-2g daily
  • The most evidence-backed supplement for brain health, focus and cognitive performance
  • EPA reduces neuroinflammation linked to depression, anxiety and brain fog
  • DHA is a structural component of brain cell membranes – essential for cognitive function
  • If you eat oily fish 2-3 times per week you may not need to supplement. If not – this is non-negotiable.
  • Look for a combined EPA and DHA of at least 1000mg per dose. Algae-based versions available for plant-based workers.
3
B Complex – daily with breakfast
  • B vitamins are critical for energy production, neurotransmitter synthesis and stress response
  • B6 directly supports serotonin and dopamine production – the neurotransmitters of motivation and mood
  • B12 is essential for nervous system function and mental clarity – deficiency causes fatigue and brain fog
  • B vitamins are water soluble and depleted rapidly by stress – making them particularly important during demanding periods at work
  • Take with food – B vitamins on an empty stomach can cause nausea
4
Vitamin D3 with K2 – 1000-2000 IU daily
  • Around 1 in 5 UK adults are deficient in Vitamin D – rising to 1 in 3 in winter months
  • Vitamin D deficiency causes fatigue, low mood, poor concentration and reduced immunity
  • Particularly important for desk workers and shift workers who have limited sunlight exposure
  • K2 ensures calcium is directed to bones rather than arteries – always take D3 and K2 together
  • Take with a meal containing fat – Vitamin D is fat soluble
5
Lion’s Mane Mushroom – 500-1000mg daily
  • One of the most interesting emerging supplements for cognitive function with a growing evidence base
  • Contains compounds that stimulate Nerve Growth Factor (NGF) – supporting brain cell growth and connectivity
  • Studies show improvements in focus, memory and mild cognitive decline
  • Well tolerated with few side effects. Effects build over 4-8 weeks of consistent use.
  • Look for a fruiting body extract rather than mycelium – significantly higher active compound content
6
Ashwagandha – 300-600mg daily
  • An adaptogen with consistent evidence for reducing cortisol, improving stress resilience and supporting cognitive performance under pressure
  • Particularly useful during high-pressure periods – restructuring, deadlines, demanding projects
  • Studies show reductions in perceived stress of 30-44% compared to placebo
  • Takes 4-8 weeks for full effect. KSM-66 is the most studied and bioavailable form.
  • Not suitable during pregnancy. Check with a GP if on thyroid medication.
Important note
Always speak to a GP before starting new supplements if you are on medication or have existing health conditions. Supplements work best alongside a good diet – they are not a replacement for it. For Tracey’s specific brand recommendations visit traceywarrennutrition.co.uk/my-recommended-supplements/
10
Detoxifying the Workplace
The hidden toxins in your office that nobody talks about

Most workplace wellness conversations focus on what people eat and how they move. Almost none address the chemical environment employees spend 40 hours a week in. The research on everyday office chemicals – from air fresheners to cleaning products – and their impact on hormones, focus and long-term health is both well-established and widely ignored.

Indoor air can be up to
5 times more polluted than outdoor air.

Plug-in air fresheners and aerosol sprays

Most contain synthetic fragrances which are a cocktail of undisclosed chemicals. Phthalates – used to make scent last longer – are endocrine disruptors that interfere with oestrogen and testosterone. Volatile organic compounds (VOCs) from aerosols contribute to indoor air pollution and have been linked to headaches, fatigue and respiratory irritation. The word “fragrance” on a label can legally represent hundreds of undisclosed chemicals.

Synthetic cleaning products

Many commercial cleaning sprays contain quaternary ammonium compounds (quats), chlorine bleach and synthetic fragrances. Quats are linked to respiratory sensitisation, skin irritation and disruption of the gut microbiome when inhaled or absorbed through skin contact. Employees who clean their own desks or work in environments where cleaning products are used frequently are at particular risk.

Printer ink and toner

Laser printers emit ultrafine particles during printing that are small enough to penetrate deep into the lungs. Studies have found these particles in the bloodstream after prolonged exposure. High-volume printing areas without adequate ventilation are a genuine occupational health concern that is rarely addressed. If your office has a printer room – it should be ventilated.

Plastic water bottles and food containers

BPA and its replacements (BPS, BPF) leach from plastic bottles and containers into food and drink – particularly when heated or scratched. These are oestrogen-mimicking chemicals that accumulate in the body over time. The research on their long-term hormonal impact is significant. Switching to glass, stainless steel or ceramic in the workplace is a simple, permanent fix.

Scented candles

Paraffin wax candles release toluene and benzene when burned – both classified as carcinogens. Synthetic fragrance in candles presents the same phthalate concerns as air fresheners. In enclosed offices with poor ventilation, regular candle burning measurably reduces air quality. If candles are used for ambience, soy or beeswax with essential oil fragrance only are significantly safer options.

Carpets, furniture and off-gassing

New carpets, furniture, paint and building materials release VOCs for months to years after installation. Formaldehyde – found in many synthetic materials – is a known carcinogen and a common cause of headaches and irritated eyes in new or recently refurbished offices. Adequate ventilation during and after refurbishment is critical and often overlooked.

Simple swaps that make a real difference
Swap OutSwap InWhy It Matters
Plug-in air freshenersOpening windows. Plants. Essential oil diffuser.Removes phthalates and VOCs from the air entirely
Aerosol cleaning spraysWhite vinegar, bicarbonate of soda or certified non-toxic brandsEliminates quats and synthetic fragrance from the working environment
Plastic water bottlesGlass or stainless steel bottles for all staffRemoves BPA and BPS exposure permanently at very low cost
Synthetic scented candlesNo candles or soy wax with essential oils onlyEliminates benzene and toluene from indoor air
Air freshener sprays in bathroomsExtractor fans, natural bamboo charcoal bagsRemoves VOCs and fragrance chemicals from a confined space
Printed receipts and documents unnecessarilyDigital alternatives where possibleReduces thermal paper BPA exposure – particularly relevant for reception and admin staff
The best air-purifying plants for offices

Spider plant (Chlorophytum comosum)

One of the most effective air purifiers available. Removes formaldehyde, xylene and carbon monoxide. Virtually indestructible – thrives in office lighting with minimal care. Highly recommended for printer areas.

Peace lily (Spathiphyllum)

Removes benzene, formaldehyde, trichloroethylene and ammonia. Thrives in low light making it ideal for offices. Also increases humidity which improves respiratory comfort in air-conditioned environments.

Snake plant (Sansevieria)

One of the few plants that converts CO2 to oxygen at night as well as during the day. Extremely low maintenance and tolerates low light and irregular watering. Ideal for desk plants.

Pothos (Epipremnum aureum)

Highly effective at removing VOCs including formaldehyde and benzene. Trails beautifully from shelves or high points. Very low maintenance and fast growing – one plant quickly becomes several.

One medium-sized plant per 10 square metres of office space is the widely cited guideline for meaningful air quality improvement. A well-planted office is not just aesthetically better – it is measurably healthier.

11
Reducing Absenteeism Through Nutrition
The immune system is built in the gut – and the gut is built in the kitchen

Sickness absence costs UK employers an average of £554 per employee per year. Much of this is driven by respiratory infections, fatigue-related illness and stress-related conditions – all of which are directly influenced by nutrition. A well-nourished immune system is more resilient, recovers faster and is less likely to succumb to the infections circulating in any shared workplace.

£554
Average annual cost of sickness absence per UK employee
70%
Of the immune system is housed in the gut – making diet the primary driver of immune resilience
4x
More likely to catch a cold when chronically sleep-deprived – sleep quality is directly nutrition-dependent
The key nutrients for immune resilience
NutrientBest Food SourcesWhy It Matters for Immunity
Vitamin CRed peppers, kiwi, broccoli, citrusStimulates production of white blood cells. Reduces duration and severity of respiratory infections.
Vitamin DOily fish, eggs, fortified foods, sunlightRegulates immune response. Deficiency significantly increases susceptibility to respiratory infection.
ZincPumpkin seeds, oysters, meat, legumesEssential for immune cell development. Deficiency impairs almost every aspect of immune function.
SeleniumBrazil nuts (2 per day), tuna, eggsPowerful antioxidant that supports immune cell activity. Two Brazil nuts provides the daily requirement.
IronRed meat, lentils, spinach, tofuDeficiency impairs immune cell production and increases susceptibility to infection. Particularly important for women.
ProbioticsGreek yoghurt, kefir, sauerkraut, kimchiSupport the gut microbiome which houses 70% of immune cells. Daily consumption measurably reduces upper respiratory infections.
Omega-3Oily fish, walnuts, flaxseedReduces chronic inflammation which suppresses immune function. Anti-inflammatory effect supports faster recovery from illness.
What HR can do to support immune health at work
1
Provide vitamin D supplements in winter – the ROI is extraordinary.
  • UK government guidance recommends vitamin D supplementation for all adults from October to March
  • A 90-day supply of vitamin D3 costs approximately £5 per person
  • Studies show vitamin D supplementation reduces respiratory infections by up to 42% in deficient individuals
  • If 10 employees avoid even one sick day each that is already a significant financial return on a minimal investment
2
Provide genuinely nutritious food options – not just any food.
  • Ultra-processed food drives gut dysbiosis which directly weakens immune function
  • Providing fruit, mixed nuts and Greek yoghurt alongside or instead of biscuits and pastries is not just wellness theatre – it is immune support
  • Consider a fruit bowl as a standard office provision – cost is minimal, impact on immune resilience over winter is real
3
Address the stress-immunity link directly.
  • Chronic stress suppresses immune function through sustained cortisol elevation
  • Employees who are chronically stressed are significantly more likely to get ill – and take longer to recover
  • Workload management, psychological safety and adequate breaks are not just HR concerns – they are immune health interventions
12
What to Serve in Meetings
The biscuit tin is actively damaging the quality of your decisions

The standard meeting refreshments in most UK offices – biscuits, pastries, sugary drinks – create a predictable blood sugar spike in the first 20 minutes of a meeting, followed by a crash that impairs concentration, decision-making and creative thinking for the rest of it. This is not a minor issue. These are the rooms where strategy is set, problems are solved and important decisions are made.

What you serve in meetings
directly affects the quality of the decisions made in them.

What to serve instead – and where to get it
Serve ThisNot ThisWhere to Get It
Mixed nuts and dried fruitBiscuits and shortbreadAny supermarket. Buy in bulk. Decant into bowls.
Dark chocolate 70%+ (broken into pieces)Milk chocolate bars or sweetsSupermarket own brand is fine. Hotel Chocolat for client meetings.
Fresh fruit platterDanish pastries and croissantsMost supermarkets sell pre-cut platters. Marks and Spencer for client meetings.
Greek yoghurt pots with berriesFlavoured yoghurts or cereal barsSupermarket own brand Greek yoghurt. Add frozen berries defrosted overnight.
Oatcakes with hummus or nut butterCrackers with processed cheeseSupermarket. Pret a Manger has good hummus pots for bought-in meetings.
Sparkling water and herbal teasSugary soft drinks and juiceStandard supermarket purchase. Fever-Tree sparkling water for client meetings.
Protein balls or energy bitesFlapjacks or cereal barsMarks and Spencer, Pret, Itsu or homemade in batches. See recipe below.
Easy no-bake energy balls – batch recipe for meetings
Makes 20 balls – takes 15 minutes
Ingredients
  • 200g oats
  • 4 tbsp peanut or almond butter
  • 3 tbsp honey or maple syrup
  • 2 tbsp ground flaxseed
  • 50g dark chocolate chips
  • Pinch of salt
Method
  1. Mix everything together in a bowl
  2. Roll into 20 balls
  3. Refrigerate for 30 minutes
  4. Keep in fridge up to 5 days
  5. Serve on a plate at room temperature
High protein. No refined sugar. Slow release energy. Costs approximately 20p per ball.
Briefing your PA or office manager
Template briefing note for office managers
Going forward please replace biscuits and pastries in meetings with the following: a bowl of mixed nuts, a plate of dark chocolate (70%+), fresh fruit and a jug of sparkling water alongside the usual tea and coffee. For client meetings please also add a fresh fruit platter from Marks and Spencer or similar. The cost difference is minimal and the reasoning is that we want to support people’s focus and energy during meetings. Thank you.
13
Hydration in the Workplace
The most overlooked driver of poor performance

Mild dehydration – as little as 1-2% of body weight in fluid loss – causes measurable reductions in cognitive performance, concentration, short-term memory and mood. In a typical office environment, most employees are mildly dehydrated for most of the working day. The economic cost of this is significant and almost entirely avoidable.

1-2%
Dehydration level at which cognitive performance measurably declines
23%
Reduction in cognitive performance tasks at even mild dehydration
2L
Minimum daily fluid intake recommended for adults in an office environment
Why office workers are chronically dehydrated

Air conditioning removes moisture from the air

Air-conditioned offices have significantly lower humidity than outdoor environments. This increases insensible water loss through breathing and skin – most people do not notice it happening until they are already dehydrated.

Caffeine is a diuretic

Coffee and tea – consumed in large quantities in most offices – increase urine output. Four cups of coffee requires at least an extra 400ml of water to compensate. Most people do not drink this extra water.

Thirst is a late signal

By the time you feel thirsty you are already mildly dehydrated. Waiting to feel thirsty before drinking means spending most of the working day in a state of mild cognitive impairment.

People confuse thirst for hunger

The hypothalamus regulates both hunger and thirst and the signals can be confused. Many afternoon snack cravings in offices are actually thirst. Drinking 500ml of water before reaching for a snack resolves this for many people.

What counts and what does not
Counts Towards HydrationCounts but Use WiselyDoes Not Help Hydration
Plain waterCoffee and tea (in moderation)Alcohol – actively dehydrating
Sparkling waterCoconut water – natural electrolytesEnergy drinks – high caffeine and sugar
Herbal teasMilk – contains water and electrolytesSugary soft drinks – drive fluid loss
Water-rich foods (cucumber, watermelon)Diluted juice – more water than juiceMore than 4 coffees – net dehydrating effect

The single most effective hydration intervention for an office is a large water bottle on every desk. Not a glass. Not a cup. A 750ml bottle that employees can see, track and refill. Visibility drives behaviour.

14
Five Working Lunches to Bring to the Office
All prepped in under 10 minutes the night before. All genuinely nutritious.

The best workplace lunch is one that is already made. Decision fatigue by midday means most people default to whatever is easiest – which is rarely the most nutritious option. These five lunches can all be made the night before in under 10 minutes and eaten at a desk if necessary.

01
Tuna and Brown Rice Pot
5 min prep – 35g protein
Ingredients
  • Cooked brown rice
  • 1-2 tins tuna in spring water
  • Spring onions and cucumber
  • Soy sauce and lemon juice
Method
  1. Mix cold rice with drained tuna
  2. Add spring onion, cucumber, soy and lemon
  3. Pack in a container. Eat cold or microwave 2 minutes.
02
Chicken and Avocado Wrap
5 min prep – 38g protein
Ingredients
  • 1 wholegrain wrap
  • 150g cooked chicken
  • Half an avocado mashed
  • Spinach and cucumber
Method
  1. Spread mashed avocado on wrap
  2. Add chicken, spinach and cucumber
  3. Roll tightly, wrap in foil. Keeps well until lunchtime.
03
Lentil and Roasted Veg Salad
5 min prep – 20g protein – plant-based
Ingredients
  • 1 tin green lentils
  • Roasted veg (batch cooked)
  • 2 tbsp tahini
  • Lemon juice and cumin
Method
  1. Drain lentils and mix with roasted veg
  2. Combine tahini with lemon and cumin
  3. Drizzle over and pack in a container. Brilliant cold.
04
Salmon and Edamame Rice Bowl
5 min prep – 40g protein
Ingredients
  • Leftover cooked salmon
  • Brown rice
  • Frozen edamame (defrosted)
  • Soy sauce and sesame oil
Method
  1. Layer rice, salmon and edamame in a container
  2. Drizzle with soy sauce and sesame oil
  3. Eat cold or microwave 2 minutes. Outstanding nutritional density.
05
Overnight Oats with Flaxseed and Berries
1 min prep – 22g protein – doubles as breakfast
Ingredients
  • 80g oats
  • 250ml oat milk
  • 1 scoop protein powder
  • 2 tbsp ground flaxseed
  • Frozen berries
Method
  1. Mix everything in a jar the night before
  2. Add berries on top
  3. Grab from the fridge on the way out. Eat at your desk. Zero morning effort.
15
The Monday Morning Reset
For when the weekend did not go to plan

Weekends happen. Social events, late nights, less structure around food and drink. Monday can feel like starting from behind before the week has even begun. This is a simple, realistic reset that does not require perfection – just a few key actions that make Monday feel manageable and set the week up well.

AM
Monday morning – before you leave the house
  • 500ml of water before anything else – you are dehydrated from the weekend regardless of how much you drank
  • A high protein breakfast – eggs, Greek yoghurt or a protein smoothie. Not toast alone. Not nothing.
  • No caffeine until after breakfast – let cortisol do its natural morning job before you add caffeine to the mix
  • If you feel rough – add a B complex and a vitamin C to your breakfast. Both are water soluble and help with the after-effects of alcohol and poor sleep.
MID
Monday midmorning – at your desk
  • Drink consistently throughout the morning – 750ml by 12pm
  • A small snack mid-morning if hungry – nuts, a piece of fruit, Greek yoghurt. Not biscuits.
  • If you are craving sugar it is almost certainly dehydration or blood sugar instability from the weekend. Drink water first.
LUNCH
Monday lunch – make it count
  • The most important meal of the Monday. Protein and vegetables – no exceptions.
  • If you have nothing prepared – a chicken or tuna salad from any supermarket is fine. Not a meal deal with crisps.
  • Eat away from your screen if at all possible. Even 15 minutes. Monday needs a proper break more than any other day.
  • A short walk after lunch on a Monday sets the tone for the whole week. Five minutes outside makes a measurable difference to afternoon focus.
EVE
Monday evening – set Tuesday up
  • Make double at dinner – Tuesday lunch is already sorted
  • Prep your water bottle and snacks for tomorrow before you go to bed
  • No alcohol on a Monday – your body is still recovering and one drink will affect Tuesday significantly more than it usually would
  • Magnesium glycinate before bed – the best investment in a good Tuesday you can make on a Monday night
The Monday reset is not about punishment.
It is not about compensating for the weekend or starting a new diet on a Monday for the fifteenth time this year. It is simply about giving your body what it needs to function well today. Water. Protein. A walk. An early night. That is it.
Take the next step
Want personalised support for your team?
Tracey offers workplace wellness talks, lunch and learn sessions and team consultations.

Get in touch to discuss a session tailored to your organisation – delivered in person or via Zoom from anywhere in the UK.

traceywarrennutrition.co.uk

Tracey Warren Nutrition
Naturopathic Nutritional Therapist
traceywarrennutrition

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