Nutrients for Cognitive Performance

Exam season, one meeting after another, the tax return still waiting in the evening – and your head feels like it's wrapped in cotton wool. Cognitive performance is no accident: it depends on sleep, exercise, energy and a solid supply of nutrients.

The short answer: Under EU law, the nutrients primarily responsible for normal cognitive function are iron, zinc and iodine; pantothenic acid (B5) contributes to normal mental performance, and DHA (250 mg/day) to the maintenance of normal brain function. Added to this are B vitamins and magnesium for the nerves and the psyche. Just as important as any single nutrient: enough sleep, exercise, fluids and stable energy.

What "cognitive function" actually means

Cognitive function encompasses all the mental processes surrounding perception, attention, memory, thinking and language – in other words, everything you use to take in, process and apply information. The brain makes up only around two per cent of your body weight, yet it consumes a considerable share of your energy. A stable supply of nutrients and energy is therefore the foundation on which concentration can function in the first place.

An important point for context: no nutrient makes you "smarter", and food supplements replace neither sleep nor exercise nor a balanced diet. What the authorised EU claims describe is the contribution of certain nutrients to normal cognitive function – that is, to keeping the existing processes running smoothly. A shortfall in relevant nutrients can make itself felt; a good baseline supply, by contrast, creates the basis on which concentration, memory and mental freshness are possible at all. That is precisely why it is worth looking at the individual nutrients.

The nutrients with an authorised cognition claim

In the EU, a number of clearly defined claims relating to cognitive function are authorised. These are worth knowing:

For more detail on these nutrients, see Recognising and Preventing Iron Deficiency, Zinc: Effects and Daily Requirement, Iodine: Effects and Requirement and Vitamin B5: Pantothenic Acid.

In brief, why these particular nutrients: iron is involved in the transport of oxygen in the blood – and the brain is especially reliant on a good oxygen supply. Zinc acts as a cofactor for numerous enzymes that also play a role in nervous tissue. Iodine is a building block of the thyroid hormones, which help regulate the entire metabolism and thus mental processes too. And pantothenic acid is involved in the energy metabolism of every cell – the basis on which the energy-hungry thinking apparatus can work at all. This gives a coherent picture: these are nutrients that take part in very fundamental processes.

Why the nerves and the psyche have a seat at the table

Concentration is never merely "thinking power" – it depends on a well-functioning nervous system and a balanced psyche. Numerous nutrients contribute to the normal function of the nervous system and to normal psychological function: several B vitamins, magnesium and vitamin C. They create the basis on which you can feel focused and balanced. When you are working your way through stressful phases, this is the real lever. For overviews, see Nutrients for the Nerves, Nutrients for the Brain and Concentration and, for the vitamins, B Vitamins at a Glance.

DHA: the building block for the brain cells

One nutrient deserves special attention when it comes to the brain: the omega-3 fatty acid DHA. It is an essential building block of the cell membranes in the brain. In the EU it is authorised that DHA contributes to the maintenance of normal brain function at a daily intake of 250 mg. Good sources are oily sea fish – and, for the plant-based option, algae oil. You can read about how the sources differ in Fish Oil vs. Algae Oil and Linseed Oil or Fish Oil: Omega-3 Compared.

Energy for the brain: the underestimated factor

The brain is an energy guzzler: despite its low weight, it demands a large share of your energy turnover. Its preferred source is glucose. What matters is not as much sugar as possible, but a steady supply – whole-grain products rather than rapidly digestible sugars keep blood sugar more stable and help prevent afternoon slumps. And even mild dehydration can affect concentration and well-being. A glass of water is often the fastest "focus booster". More in Nutrients for Energy Metabolism.

What research is investigating

It is well established and uncontroversial that an adequate supply of iron, zinc, iodine and the B vitamins forms the basis for normal mental processes – the authorised EU claims are derived from this. Beyond that, active areas of investigation include the role of omega-3 fatty acids in brain structure across the lifespan, the interplay of nutrition, sleep and mental performance, and the significance of a stable blood-sugar supply for concentration. To be honest: no single nutrient makes anyone smarter overnight – it is the interplay of baseline supply and lifestyle.

The B vitamins: a team for nerves and energy

No single B vitamin is "the brain vitamin" – it is the team that counts. Several B vitamins contribute to normal energy metabolism, to the normal function of the nervous system and to normal psychological function. A few examples that are particularly relevant for the brain:

With a purely plant-based diet in particular, vitamin B12 deserves special attention, because it occurs almost exclusively in animal-based foods – see Meeting Your Vitamin B12 Needs on a Vegan Diet. If you are constantly under pressure, you will find suitable combinations in Nutrients for Stress at Work and Nutrients for Shift Workers.

Supporting cognitive performance in everyday life

• Get enough sleep: sleep is the most important recovery phase for the brain and the basis for memory and focus.
• Exercise regularly: movement promotes circulation.
• Schedule breaks: short interruptions keep concentration fresh.
• Eat and drink steadily: an even supply of energy and fluids rather than a sugar roller coaster.

If you are in the middle of a study or exam phase, this very combination is worth its weight in gold – see Nutrients for Students During Exams and, for the desk, Nutrients for the Office and Screen. If concentration or memory problems persist, please have them checked by a doctor.

An often underestimated point is the order of priorities: anyone who sleeps poorly, barely moves and gets through the day on sugar and coffee will not get the most out of any nutrient. Conversely, a solid baseline supply of iron, zinc, iodine, the B vitamins and DHA – together with sleep, exercise and stable energy – forms a foundation on which mental performance becomes sustainable in the first place. Food supplements are the building block that closes a demonstrable gap here – not a substitute for a healthy everyday life.

Concentration at the screen: modern everyday life

A large part of our mental work now takes place in front of the monitor – and that is exactly where the typical slumps in performance arise. In experience, three things help most: regular screen breaks (stand up briefly, look into the distance, clear your head), drinking enough (a glass of water within reach rather than non-stop coffee) and a stable meal structure instead of a snacking roller coaster. If you sit at a desk all day, you will find targeted combinations in Nutrients for the Office and Screen and – for the eyes – in Nutrients for the Eyes at the Screen. Working from home also brings its own pitfalls; on this, see Nutrients When Working From Home.

Cognition across different stages of life

The need accompanies us throughout life. In children, iodine expressly contributes to normal cognitive development, which is why an adequate iodine supply receives particular attention during this phase. In adulthood, it is mainly about maintenance through a good baseline supply, exercise and sleep. With a purely plant-based diet, it is worth taking a close look at iron, zinc and iodine, since these nutrients are found predominantly in animal-based foods or are less well absorbed from plant sources – on this, see Nutrients for Vegans. The good news: anyone who eats a varied diet already covers a great deal through their meals. Food supplements then make sense when individual nutrients are demonstrably in short supply.

Matching products from Scheunengut

In the Brain & Nerves category you will find products for concentration and mental fitness. You can discover individual nutrients such as iron, zinc, iodine and the B vitamins in Vitamins, Minerals & Trace Elements and, specifically, under B Vitamins. For stressful phases, it is worth taking a look at Energy. All products are laboratory-tested and made in Germany.

Frequently Asked Questions (FAQ)

Which nutrients contribute to normal cognitive function?

Under EU law, iron, zinc and iodine contribute to normal cognitive function, and pantothenic acid (B5) to normal mental performance. DHA contributes to the maintenance of normal brain function at 250 mg per day. In addition, B vitamins, magnesium and vitamin C support the nervous system and the psyche.

Does omega-3 (DHA) help the brain?

DHA is an essential building block of the cell membranes in the brain. In the EU it is authorised that DHA contributes to the maintenance of normal brain function at a daily intake of 250 mg. Good sources are oily sea fish and – plant-based – algae oil.

What role do sleep and nutrition play in concentration?

A very large one. Sleep is the brain's most important recovery phase, exercise promotes circulation, and an even supply of energy and fluids helps prevent slumps in performance. Nutrients create the basis, but without sleep, breaks and stable energy the effect remains limited.

What should vegans and vegetarians pay attention to for cognition?

Particularly iron, zinc and iodine, since these nutrients are found predominantly in animal-based foods or are less well absorbed from plant sources. The DHA supply is also worth a look – here algae oil is the plant-based source. If a deficiency is suspected, have it checked by a doctor.