Cognitive Supplements: A Science-Based Guide
What are cognitive supplements?
Cognitive supplements are products containing nutrients and botanical ingredients associated with supporting normal brain function. Interest in brain-supporting nutrients has grown in recent years as people look for ways to support their mental well-being in daily life.
These products are available in various forms: capsules, softgels, and powders. In the European Union, only EFSA (European Food Safety Authority) approved health claims may be used.
It is important to distinguish between nutrients that have EFSA-confirmed claims for cognitive function and botanical ingredients for which no such approved claims exist.
Supported benefits (EFSA-approved claims only)
The following benefits are based on health claims authorised under Commission Regulation (EU) No 432/2012.
DHA (docosahexaenoic acid)
- DHA contributes to the maintenance of normal brain function — this claim is valid when the product provides at least 250 mg of DHA per daily dose. DHA is an omega-3 fatty acid abundantly present in brain tissue.
Zinc
- Zinc contributes to normal cognitive function — this claim is valid when the product provides at least 1.5 mg of zinc (15% of the Nutrient Reference Value) per serving.
Iron
- Iron contributes to normal cognitive function — this claim is valid when the product provides at least 2.1 mg of iron (15% of the Nutrient Reference Value) per serving.
Iodine
- Iodine contributes to normal cognitive function — this claim is valid when the product provides at least 22.5 micrograms of iodine (15% of the Nutrient Reference Value) per serving.
Pantothenic acid (vitamin B5)
- Pantothenic acid contributes to normal mental performance — this claim is valid when the product provides at least 0.9 mg of pantothenic acid (15% of the Nutrient Reference Value) per serving.
Important note: Claims such as "improves memory", "boosts brain power", "prevents cognitive decline", or "nootropic" (used as a health claim) are not permitted. These are either overly broad or medical claims that may not be used for food supplements.
Common ingredients
DHA / Omega-3
DHA (docosahexaenoic acid) is an omega-3 fatty acid that is an important structural component of brain tissue. It is found in fatty fish such as salmon, mackerel, and sardines. DHA contributes to the maintenance of normal brain function (EFSA-approved claim, valid at a minimum of 250 mg DHA per daily dose). As a supplement, DHA is available in fish oil capsules and algae-based products.
Lion's mane (Hericium erinaceus)
Lion's mane is an edible mushroom that has long been used in traditional Asian cuisine and folk medicine. Scientific literature has investigated the hericenone compounds it contains and their relationship to nerve growth factors. Lion's mane is available in capsule, powder, and extract form. There are currently no EFSA-approved health claims for lion's mane.
Bacopa monnieri
Bacopa monnieri is a plant that has been used for centuries in the Ayurvedic tradition. Its primary bioactive compounds are bacosides. Bacopa is available in capsule and powder form, often standardised for bacoside content. There are currently no EFSA-approved health claims for bacopa monnieri.
Ginkgo biloba
Ginkgo biloba is one of the oldest tree species in the world, and its leaf extract has traditionally been used in Chinese medicine. Ginkgo contains flavonoids and terpenoids. As a supplement, ginkgo is available in capsule and tablet form. There are currently no EFSA-approved health claims for ginkgo biloba in food supplements.
L-theanine
L-theanine is an amino acid found naturally in green and black tea. It is one of the most common ingredients in cognitive supplements. L-theanine is available in capsule and powder form. There are currently no EFSA-approved health claims for L-theanine.
Tyrosine
Tyrosine is an amino acid that the body uses in the synthesis of certain neurotransmitters. It is found in protein-rich foods such as meat, fish, eggs, and dairy products. Tyrosine is available in capsule and powder form. There are currently no EFSA-approved health claims for tyrosine.
Forms
Cognitive supplements are available in several forms:
- Capsules — the most common form, convenient to dose and carry
- Softgels — particularly suitable for oil-based ingredients like DHA/omega-3, as the fat-soluble contents are protected from oxidation
- Powder — allows more flexible dosing, can be mixed into drinks or smoothies
The choice of form depends on personal preference. What matters is the amount of active ingredients per serving, not the form itself.
How to take them
- Always follow the recommended daily serving stated on the label — do not exceed it
- Some ingredients (such as DHA) are better absorbed with fat-containing food
- Where possible, take supplements with a meal unless the label states otherwise
- If using multiple supplements, check that the amounts of individual nutrients (e.g., zinc) do not accumulate above recommended levels
- If you take medications, consult your doctor about potential interactions before use
Who uses cognitive supplements?
Cognitive supplements are commonly used by:
- Students who want to support their mental performance during intensive study periods
- Office workers and knowledge workers who spend long hours on tasks requiring concentration
- Physically active individuals who want to support mental well-being alongside physical health
- Older adults interested in ensuring adequate nutrient intake
- People with restricted diets (e.g., vegans who do not get DHA from fish)
Frequently Asked Questions
Will cognitive supplements make me smarter?
Supplements do not make anyone smarter. EFSA-approved claims confirm that certain nutrients (DHA, zinc, iron, iodine) contribute to normal cognitive function and vitamin B5 contributes to normal mental performance, but this does not mean they raise cognitive abilities above normal levels.
What is the difference between an EFSA-approved claim and a manufacturer's promise?
EFSA-approved claims are scientifically evaluated and authorised by the European Commission. They may legally be used in the marketing of food supplements. For ingredients without approved claims (such as lion's mane or bacopa), health claims may not be made.
Can I combine multiple cognitive supplements?
Supplements can generally be combined, but always follow the recommended dosage for each product. Check that the total amounts of individual nutrients (e.g., zinc) from different products do not exceed recommendations. When in doubt, consult your doctor.
Can DHA only be obtained from fish?
No, DHA is also available from algae-based supplements, which are suitable for vegans and people who do not consume fish products. Check the DHA content per serving on the label.
Why do some ingredients have a note that there is no EFSA claim?
EFSA evaluates health claims according to strict scientific criteria. If an ingredient has no approved claim, it means that submitted applications were not sufficiently substantiated or none were submitted at all. This does not necessarily mean the ingredient is useless — simply that there is no EU-level confirmed health claim.
Are lion's mane and bacopa safe?
Lion's mane and bacopa monnieri have a long history of use. As with any supplement, follow the recommended dosage and consult your doctor if you take medications or have health concerns.
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See also:
- Omega-3 Fish Oil: A Science-Based Guide
- Brain Fog Supplements: Best Choices for Focus
- Lion's Mane: Brain and Nerve Health
- L-Theanine: Calm Focus Without Drowsiness
Important information
Toidulisand ei asenda mitmekesist ja tasakaalustatud toitumist ega tervislikku eluviisi.
A food supplement is not a substitute for a varied and balanced diet and a healthy lifestyle.
Биологически активная добавка не является заменой разнообразного и сбалансированного питания и здорового образа жизни.
