We often think about food in terms of physical health, energy and weight management, but what we eat also plays an important role in how our brain performs throughout the working day.
The brain is one of the body’s most energy-demanding organs. It relies on a steady supply of nutrients and energy to support concentration, memory, decision-making, problem-solving and mood. While no single food can suddenly make us more productive, a balanced diet can provide the nutrients our brain needs to perform at its best.
For anyone spending much of their day concentrating, making decisions, attending meetings or working through complex tasks, nutrition is therefore another part of maintaining workplace wellbeing.
Why nutrition matters for the working brain
The brain needs a consistent supply of glucose for energy, alongside a range of vitamins, minerals, fatty acids and other nutrients to support normal brain function.
This does not mean reaching for sugary snacks whenever concentration starts to dip. Foods high in refined sugar can provide a quick source of energy, but this may be followed by a drop in energy and concentration. Instead, meals and snacks containing complex carbohydrates, protein, healthy fats, fruit and vegetables can help provide more sustained energy.
Hydration is equally important. Even mild dehydration can contribute to tiredness, headaches and difficulties concentrating. Keeping a bottle of water at your desk and drinking regularly throughout the day is a simple habit that can support both physical and mental performance.
A healthy approach to eating for brain health is not about finding a miracle food. It is about consistently giving your brain the nutritional building blocks it needs.
Three foods to boost your brain
There are plenty of foods that can form part of a brain-friendly diet, but three particularly useful options are oily fish, berries and nuts.
Oily fish
Salmon, sardines, mackerel, trout and other oily fish are excellent sources of omega-3 fatty acids, particularly EPA and DHA.
DHA is an important structural component of the brain and plays a role in normal brain function. Omega-3 fatty acids are also involved in a range of processes throughout the body, making oily fish a valuable addition to a balanced diet.
For people who spend much of their working day using their brain, regularly including oily fish can be a simple way of increasing their intake of these important fats.
Try adding salmon to a lunchtime salad, having sardines on wholegrain toast or including mackerel in a sandwich or wrap.
The NHS recommends eating at least two portions of fish a week, including one portion of oily fish. This can form part of an overall healthy and balanced diet.
If you do not eat fish, plant sources such as flaxseeds, chia seeds and walnuts provide another source of omega-3 fats, although they contain a different form of omega-3 to the EPA and DHA found in oily fish.
Berries
Blueberries, strawberries, raspberries and blackberries are packed with nutrients and naturally occurring plant compounds called polyphenols.
Berries are particularly useful as a workplace snack because they are easy to add to breakfast, yoghurt or porridge, or simply eat on their own.
Research into berries and brain health has attracted considerable interest because their antioxidant and anti-inflammatory properties may help support healthy ageing and cognitive function. While we should not expect a handful of blueberries to transform our concentration instantly, regularly including a variety of fruit and vegetables is associated with a healthy dietary pattern.
Berries also provide fibre and can satisfy a desire for something sweet without relying on confectionery or highly processed snacks.
Try adding a handful of berries to Greek yoghurt, mixing them into overnight oats or keeping some fresh or frozen berries available at home for an easy breakfast option.
Nuts
Nuts are another convenient food for supporting a healthy diet and can make an excellent alternative to biscuits, crisps or other highly processed workplace snacks.
Walnuts, almonds, hazelnuts and other nuts provide healthy unsaturated fats, protein, fibre, vitamins and minerals. Walnuts are also a source of plant-based omega-3 fatty acids.
The combination of protein, fibre and healthy fats can help make nuts a satisfying snack between meals. This can be particularly useful during a busy working day when it is tempting to reach for something quick and sugary.
A small handful of unsalted nuts can be added to breakfast, sprinkled over a salad or eaten as a convenient afternoon snack.
As with any food, portion size matters. Nuts are nutrient-dense and relatively high in calories, so a small handful is generally enough.
Don’t forget your leafy greens
Although our three featured foods are useful additions to the diet, brain-friendly nutrition goes much further.
Leafy green vegetables such as spinach, kale, broccoli and cabbage provide folate, vitamin K, carotenoids and other nutrients. Eating a wide variety of vegetables helps ensure we receive a broad range of vitamins, minerals and plant compounds.
Try making vegetables a regular part of lunch rather than an afterthought. A simple change such as adding spinach to a sandwich, choosing a vegetable-based soup or including a side salad can increase your daily intake without requiring a major change to your routine.
The importance of slow-release energy
One of the biggest mistakes we can make during a busy working day is relying on quick fixes.
Skipping breakfast, having a coffee instead of lunch or surviving on biscuits during an afternoon meeting may feel convenient, but it is unlikely to provide the nutritional balance needed to support sustained energy.
Wholegrains such as oats, brown rice, wholegrain bread and wholewheat pasta contain complex carbohydrates and fibre. Combined with protein and healthy fats, they can help create more balanced meals.
For example, a lunch containing wholegrain bread, chicken or hummus, salad and avocado is likely to be more sustaining than a lunch based around highly refined carbohydrates alone.
The aim is not to eliminate carbohydrates. Your brain needs glucose for energy. Instead, focus on choosing nutritious carbohydrate sources and combining them with other food groups.
What about caffeine?
For many people, coffee is an important part of the working day. Caffeine can increase alertness and temporarily reduce feelings of tiredness, which is why coffee and tea can feel particularly useful when concentration is required.
However, caffeine is not a replacement for sleep, food or hydration.
Large amounts of caffeine, particularly later in the day, can interfere with sleep. Poor sleep can then affect concentration, memory, mood and productivity the following day.
If you rely heavily on caffeine to get through the working day, it may be worth considering whether the underlying issue is inadequate sleep, poor nutrition, dehydration or a lack of breaks.
Build a brain-friendly working day
Eating for brain health does not require a complicated meal plan or expensive supplements. Small changes to everyday habits can make a difference.
Start the day with a balanced breakfast such as porridge with berries and nuts. Choose a lunch containing a source of protein, wholegrains and plenty of vegetables. Keep fruit or a small portion of unsalted nuts available for snacks. Drink water regularly throughout the day.
It is also worth thinking about your working environment. If meetings regularly run through lunch, or your workload makes it difficult to take proper breaks, nutrition can quickly become an afterthought.
Taking time away from your screen to eat properly is not wasted time. A genuine break can provide an opportunity to move, hydrate, eat and reset before returning to work.
Think long-term, not quick fixes
There is no single food that will instantly improve your memory, concentration or productivity. Brain health is influenced by many factors, including diet, physical activity, sleep, stress, social connection and overall health.
The best approach is therefore to think about dietary patterns rather than individual foods.
A colourful, varied diet containing plenty of vegetables and fruit, wholegrains, healthy fats and sources of protein gives your body and brain a much broader range of nutrients than relying on processed foods and quick energy fixes.
So, the next time you reach for an afternoon snack at your desk, think beyond simply satisfying hunger. Could you choose something that supports your brain as well?
Oily fish, berries and nuts are three simple places to start.
Your brain works hard throughout the day. Giving it the right fuel is one more way of helping yourself stay focused, energised and productive at work.