What is a nootropic and what should you check before buying one in Spain?

Raíz de ginseng, rodaja de rodiola, una rama de bacopa, pimienta negra, cristales y dos polvos en fila sobre una superficie gris azulada
Nootropics

What is a nootropic and what should you check before buying one in Spain?

A nootropic is a substance or product presented as support for one or more cognitive functions, such as attention, memory, learning or alertness.

10 min read · Published 23 Oct 2026
Ginseng root, a slice of rhodiola, a sprig of bacopa, black pepper, crystals and two powders in a row on a blue-grey surface

The term is used for very different products: medicines, synthetic compounds, plant extracts, amino acids, vitamins and supplements. That is why calling something a “nootropic” does not, on its own, tell you what it contains, whether it works or whether it is right for you.

In Spain, the first step is to tell a food supplement (complemento alimenticio, the legal term for what we usually call a supplement) apart from a medicine. A food supplement is a food that provides concentrated sources of nutrients or other substances with a nutritional or physiological effect. It is not a medicine and it is not intended to prevent or treat disease, as AESAN explains in its information on food supplements. The word “nootropic” describes an intended use or a broad marketing category, not a health guarantee.

01What it is

The word “nootropic” covers very different products

The scientific literature does not use a single classification either. A review published in Nutrients describes nootropics as a heterogeneous group and notes that the term has been applied to substances with different uses, doses and safety profiles. Some are researched in specific clinical settings; others are sold as supplements for healthy people.

Nootropic, supplement and medicine

That difference matters. A medicine is developed and authorised for specific indications, with an assessment of quality, safety and efficacy appropriate to its category. A food supplement is sold as a food and must comply with the rules that apply to its composition, labelling, presentation and advertising. In Spain, Royal Decree 1487/2009 defines food supplements and establishes, among other things, that they must be sold under the name “complemento alimenticio” and that no property of preventing, treating or curing a disease may be attributed to them.

That is why you should be wary of any product that uses “nootropic” as if it were a certification. It is not one. The useful question is not just “is it a nootropic?”, but:

  • Which ingredients does it contain, and in what amounts?
  • What specific effect is being studied?
  • Does the evidence correspond to the ingredient and the dose in the product?
  • What warnings appear on the label?
  • Could it interfere with something you already take?
02Label

The label should let you know what you are buying

A formula is easier to assess when it declares the amount of each ingredient per dose. The NIH Office of Dietary Supplements explains that a supplement label lists the active ingredients, the amount per serving and the other ingredients.

Look for these details before comparing two products:

  1. Amount per dose. “Bacopa” or “ginseng” is not enough. You need to know how many milligrams the product provides and which extract it uses.
  2. Recommended daily dose. Check how many capsules or scoops make up a serving, and do not exceed it of your own accord.
  3. Total caffeine. Add the caffeine in the product to what you get from coffee, tea, energy drinks, soft drinks and other supplements.
  4. Standardised extracts. For plants and extracts, the species, the part used and the standardisation help you know what you are comparing.
  5. Proprietary blends. If the label only shows the total weight of a blend and not the amount of each substance, it is hard to assess the real dose.
  6. Warnings and interactions. Check the information on pregnancy, breastfeeding, age, medicines, caffeine sensitivity and medical conditions.

A quality certification can tell you something about manufacturing, identity or contamination, but on its own it does not show that a product is effective for improving focus. The NIH also warns that a quality seal does not guarantee that a supplement is safe or effective.

03Evidence

Read the evidence ingredient by ingredient, at the dose used

When a brand cites studies, it is worth checking which ingredient they are about, what amount was used and what outcome was measured, and then comparing that with what the label declares. That is why it matters so much that the formula states the amount of each ingredient: without that figure, there is no way of knowing whether what you take resembles what has been studied.

Reading the evidence properly means being specific:

  • Find the dose of each ingredient on the label and compare it with the dose in the studies the brand cites.
  • Look at the outcome that was measured, because attention, mental fatigue, memory and perceived energy are not the same thing.
  • Check how long the studies lasted: some ingredients, such as caffeine, are noticeable quickly, while others have been studied over weeks of daily use.
  • A result in people with a deficiency or a clinical condition cannot simply be transferred to healthy adults.
  • An ingredient being natural does not mean it is harmless or that it cannot interact with medicines.

Health claims have limits too. AESAN explains that authorised claims must meet conditions of use and that a food cannot be presented as able to prevent, treat or cure a disease. A message such as “contributes to normal energy-yielding metabolism” does not mean “treats tiredness” or “improves any concentration problem”.

04Caffeine

Caffeine deserves a check of its own

Caffeine is one of the most common ingredients in products for energy, alertness and mental performance. According to EFSA, in healthy adults single doses of up to 200 mg and an intake of up to 400 mg a day, counting all sources and spread across the day, do not raise safety concerns for the general population. EFSA also states that a single dose of 100 mg can affect sleep in some people, especially if taken close to bedtime.

  • 100mgSingle dose that can affect sleep in some people if taken close to bedtime
  • 200mgSingle dose for healthy adults
  • 200mgPer day during pregnancy, from all sources
  • 400mgPer day for healthy adults, spread out and from all sources

These figures are reference values for healthy people, not a personal recommendation. Sensitivity varies from person to person, and caffeine can cause jitteriness, palpitations, digestive discomfort or insomnia.

In practice

To assess a product that contains caffeine:

  • count every source over the day, not just the capsule;
  • look at the amount of caffeine per dose and the time you take it;
  • avoid using it as a regular way to make up for lack of sleep;
  • cut down if you notice side effects;
  • check with a healthcare professional if you have a medical condition, take medication or are unsure about your personal limit.

During pregnancy, EFSA’s assessment puts the caffeine intake from all sources that does not raise safety concerns for the foetus at 200 mg a day. Even so, pregnancy and breastfeeding are situations in which it is worth asking before taking a supplement with caffeine or plant extracts. AESAN sets out specific warnings for products with caffeine and certain plant ingredients, and a general figure cannot simply be applied to any formula.

05Ingredients

What to check if the product contains plants, amino acids or vitamins

The ingredients in a formula do not all play the same role or have the same evidence behind them. The scientific review mentioned above includes families such as plant extracts, compounds involved in brain metabolism and cholinergic substances, but it also notes that their uses, doses, possible side effects and contraindications differ.

A practical check starts with the profile of each substance:

What to check by type of ingredient
Type of ingredientWhat to check
Caffeine and other stimulantsTotal amount, how it adds up with other sources, time of day and effect on sleep
Plants and adaptogensSpecies, part used, extract, standardisation, warnings and interactions
Amino acidsAmount per dose, intended use and whether there are specific warnings
Vitamins and mineralsDaily amount, intake from other products and the associated authorised claim
Multi-ingredient blendsIndividual amount of each component, so you can compare it with the studies

A transparent formula declares the amount of each ingredient and does not promise more than has been studied for each of them.

06When to ask

Some situations call for advice before you start

Talk to a doctor, pharmacist or dietitian before you start if:

  • you are pregnant, breastfeeding or trying to get pregnant;
  • you take prescription or over-the-counter medicines;
  • you have a diagnosed condition or persistent symptoms;
  • you are highly sensitive to caffeine or have a history of insomnia, anxiety, palpitations or high blood pressure;
  • you are about to have surgery;
  • you are looking to replace a treatment or fix a problem with memory, attention or tiredness;
  • you want to give it to a minor.
In practice

The NIH recommends keeping a record of your medicines and supplements and sharing it with your healthcare professionals. NCCIH also recommends telling them about every supplement and medicine you take, with the doses, so that possible interactions can be assessed. If you have an adverse reaction, stop taking the product and seek medical advice.

07Example with a real label

Where VENZE Energy + Focus fits in

Energy + Focus is a food supplement in capsules, not a medicine. The Energy + Focus product page gives a daily dose of two capsules and declares nine ingredients with individual amounts.

  • 2capsules a day, in the morning
  • 9ingredients with declared amounts
  • ≈75 mgof caffeine per daily dose
A VENZE Energy + Focus jar in semi-opaque grey glass with a black lid, on a blue-grey background
Amounts per daily dose (2 capsules), according to the product page
IngredientPer daily dose
L-tyrosine300 mg
Cognizin® (citicoline)250 mg
Bacopa monnieri200 mg
Rhodiolife®200 mg
Ginseng150 mg
Newcaff®75 (prolonged-release microencapsulated caffeine)100 mg, with ≈75 mg of caffeine
Coenzyme Q1050 mg
BioPerine®5 mg
Vitamin B122.5 µg

The product page itself says to take it at the start of the day, with breakfast, and to avoid it in the afternoon because of its caffeine content. If you compare it with another product, compare the actual dose, your total caffeine for the day, the warnings and how transparent the label is. Combining nine ingredients in two capsules simplifies your routine, but it is still worth checking the caffeine and the warnings before you start.

Energy + Focus is designed for the daily routine of people with demanding jobs, not for treating a disease or making up for nights of too little sleep. Sleeping, eating well and organising your work are still the foundation, and a supplement adds to that routine without replacing it.

See the Energy + Focus formula and dose
08Questions

Frequently asked questions about nootropics

Is a nootropic the same as a supplement?

Not necessarily. “Nootropic” is a broad term that can refer to medicines, synthetic substances and supplements. A particular supplement may be marketed to support cognitive functions, but its legal category and its obligations depend on what it is and how it is sold.

Do nootropics work from the first dose?

It depends on the ingredient, the dose, the person and the goal. Caffeine can increase alertness and reduce drowsiness at moderate doses and its effects are felt quickly. Other ingredients have been studied over weeks of daily use, so it is worth checking how long the studies on each one lasted.

Can I take a nootropic with coffee?

It depends on your total caffeine for the day and on what the label says. The Energy + Focus product page, for example, states that it is compatible with coffee and tea, and the product provides about 75 mg of caffeine per dose, so every coffee adds to that figure and, with it, to the risk of jitteriness or poorer sleep.

Are natural nootropics safer?

Not just because they are natural. Safety depends on the substance, the dose, the preparation, the quality, the person and their medicines. Plant extracts can also cause side effects or interactions.

Can a supplement treat poor concentration?

It should not be presented as a treatment for a disease or a disorder. If poor concentration, tiredness or memory problems persist, it is better to look for the cause with a healthcare professional than to try to mask it with a supplement.