Nootropics - brain supplements - are one of the fastest-growing supplement segments globally. Thousands search every month for nootropics and brain supplements, but it remains an area surrounded by confusion, misleading marketing and a difficult-to-navigate boundary between legal supplements and prescription medications.
This guide clarifies what nootropics actually are, which have scientific support, what is legal to buy in the EU - and how to build a simple, effective stack without gambling on unclear substances.
What is a nootropic?
The term was coined in 1972 by Romanian chemist and physician Corneliu Giurgea. His definition was specific: a nootropic must improve cognitive function, protect the brain from damage and have minimal side effects. In practice today it is used as an umbrella term for everything from caffeine and lion's mane to modafinil and racetams.
The important distinction:
- Natural nootropics (supplements): Lion's mane, L-theanine, bacopa monnieri, ginkgo biloba, ashwagandha, lithium orotate. Legal to buy without prescription.
- Pharmacological nootropics (medications): Modafinil, piracetam, aniracetam, noopept. Require prescription in the EU or are classified as controlled substances.
At Noop we only sell legal, natural nootropics - that is the category we focus on here.
The best documented natural nootropics
Lion's Mane (Hericium erinaceus) - for long-term cognitive health
Lion's mane is the most well-researched medicinal mushroom for cognitive health. It contains bioactive compounds called erinacines and hericenones that stimulate production of NGF (nerve growth factor) - a protein critical for nerve cell growth, survival and repair. A Japanese RCT showed significant improvements in cognitive test results after 16 weeks of supplementation. Lion's mane is a long-term supplement - the effect builds up gradually and is not noticed after a few days.
Products: Lion's Mane Noop | Lion's Mane 500 mg Swanson
L-Theanine + Caffeine - the most well-studied stack
If there is a nootropic combination with the strongest scientific foundation, it is L-theanine combined with caffeine. L-theanine is an amino acid from green tea that increases alpha brainwaves - the mental state associated with relaxed alertness. Combined with caffeine it dampens the nervousness and restlessness that caffeine alone can cause, and enhances focus and reaction time. The effect is well-replicated in multiple controlled studies. Noop Nectr Energy Pouches combine caffeine with L-theanine and additional nootropics.
Products: Nectr Energy Pouches | L-Theanine 100 mg Swanson
Lithium Orotate - the most underrated nootropic
Lithium orotate at microdose (5-10 mg) is increasingly discussed in nootropic circles and is now in Bryan Johnson's Blueprint protocol. The mechanisms are meaningful: inhibition of GSK-3beta (linked to tau phosphorylation), stimulation of BDNF (the brain's growth protein) and reduction of neuroinflammation. The 2025 Harvard-led Nature study on lithium and Alzheimer's risk has given new scientific substance to the epidemiological observation. It is not an acute focus supplement - it is a long-term neuroprotection supplement.
Products: Lithium Orotate 5 mg Swanson | Complete guide to Lithium Orotate
Bacopa Monnieri - for memory and learning
Bacopa is one of the most well-studied Ayurvedic plants for cognitive health, with documented effects on memory and learning in multiple RCTs. A meta-analysis of 9 studies found significant improvement in episodic memory, attention processes and information processing speed. Important point: the effect of bacopa is time-dependent. It takes 8-12 weeks of consistent use before full effect is noticed. It is not a pre-workout supplement but a structural brain health intervention.
Ginkgo Biloba - for blood flow and memory
Ginkgo biloba is one of the world's most sold dietary supplements. The effect is linked to improved blood flow in the brain via inhibition of platelet aggregation and vasodilation. Studies show improvement in memory and concentration, especially in older adults.
Products: Ginkgo Biloba 60 mg Swanson
Ashwagandha - for cognitive health under stress
Ashwagandha is primarily known as an adaptogen and stress reducer - but stress reduction is by definition cognitive improvement. Chronic stress is one of the strongest inhibitors of prefrontal cortex function (decision-making, focus, working memory). Ashwagandha's KSM-66 extract has shown significant improvement in reaction time, cognition and memory in controlled studies.
Products: Ashwagandha Noop
L-Tyrosine - for focus under pressure
L-Tyrosine is an amino acid that is a precursor to dopamine and noradrenaline - neurotransmitters central to motivation, focus and stress response. It is one of the nootropics with the strongest evidence for cognitive function under stressful conditions: military research showed that L-tyrosine counteracted cognitive decline during cold exposure and sleep deprivation. Best for those who need to perform under pressure, not as daily baseline supplementation.
Products: L-Tyrosine 500 mg Swanson
Nootropics comparison table
| Nootropic | Primary effect | Evidence strength | Time profile |
|---|---|---|---|
| L-Theanine + Caffeine | Focus, alertness, calm | Strong (many RCTs) | Acute (30-60 min) |
| Lion's Mane | NGF, long-term cognition | Medium-strong | Long (weeks-months) |
| Bacopa Monnieri | Memory, learning | Strong (meta-analysis) | Long (8-12 weeks) |
| L-Tyrosine | Focus under stress/pressure | Strong (specific situations) | Acute (need-based) |
| Ginkgo Biloba | Blood flow, memory | Medium | Medium-term |
| Ashwagandha | Stress reduction, cognition | Strong (KSM-66) | Medium-term (2-6 weeks) |
| Lithium Orotate | Neuroprotection, mood | Emerging (epidemiology + mechanisms) | Long (months+) |
What is legal in the EU?
The natural nootropics mentioned above - lion's mane, L-theanine, bacopa, ginkgo, ashwagandha, lithium orotate, L-tyrosine - are all legal to buy and use in the EU without prescription.
The grey zone arises with: Racetams (piracetam, aniracetam, oxiracetam) - prescription medications. Modafinil/Armodafinil - requires prescription. Noopept - prescription-only. Microdosing psychedelics - illegal. If you see products marketed as "nootropics" containing racetams, peptides or substances with names ending in "-cetam" - these are with high probability prescription-only or prohibited.
How to build a nootropic stack
Beginner stack (proven, affordable, effective)
- Morning: L-Theanine 100-200 mg + caffeine (coffee or Nectr Energy Pouches)
- Daily base: Lion's Mane 500 mg
- Under stress/pressure: L-Tyrosine 500 mg as needed
Advanced stack (long-term cognitive health)
- Morning: Lion's Mane + Bacopa Monnieri + Ginkgo Biloba
- Focus as needed: L-Theanine + Caffeine or Nectr
- Neuroprotection: Lithium Orotate 5 mg daily
- Stress management: Ashwagandha 300-600 mg
Bryan Johnson Blueprint stack (longevity focus)
Johnson includes several nootropics in his Blueprint protocol: Lion's mane, lithium orotate, NAD+, bacopa and ashwagandha. Read more in our complete guide to Bryan Johnson Blueprint.
See the full Noop nootropics collection for a complete range of brain supplements you can buy legally.
FAQ
What is the difference between nootropics and smart drugs?
"Smart drugs" is a popular term covering both legal supplements (natural nootropics) and prescription medications like modafinil. Natural nootropics are legal and can be purchased without prescription. Prescription "smart drugs" require a doctor's prescription.
Do nootropics actually work?
Depends entirely on which substance. L-theanine + caffeine, bacopa and lion's mane have robust scientific support in human studies. The market also contains a lot of hype and undocumented claims. Stay with individual ingredients with clinical evidence rather than proprietary blends.
Can you combine multiple nootropics?
Yes, that is the whole idea of a stack. Start with one or two supplements, observe the effect, and add gradually. Avoid starting six substances simultaneously - you cannot isolate what is working.
Do nootropics affect sleep?
Caffeine late in the day affects sleep. L-theanine is best taken in the morning or early afternoon but can actually improve sleep quality via alpha brainwaves. Bacopa and lion's mane are sleep-neutral. Lithium orotate can be taken in the evening and improves sleep quality for some.