· By GUUDIES Editorial Team
Best Natural Nootropics UK: Lion's Mane, B Vitamins & Focus Gummies
By the GUUDIES Editorial Team · Updated 25 October 2026 · Claims checked against the GB Nutrition and Health Claims Register; studies linked below.
Disclosure: GUUDIES makes a daily gummy pouch that includes lion's mane and B vitamins. We make no brain, focus or memory claims for lion's mane, because none are authorised in Great Britain.
The short answer: the "natural nootropics" with the firmest footing in the UK are not the exotic ones. Caffeine contributes to increased alertness, and several B vitamins, iodine and zinc have authorised claims for normal mental performance, psychological function or cognitive function. Lion's mane, L-theanine and other herbs have interesting but early research and no authorised claims. Sleep, food and regular movement still matter more than any gummy.
What Is a Nootropic?
"Nootropic" is a marketing term for substances said to support thinking, focus or memory. It is not a regulatory category in the UK. Food supplements can only use health claims listed on the GB Nutrition and Health Claims Register, so a product saying it "boosts brain power" or "improves memory" is going beyond the rules.
Natural Nootropics Compared
| Ingredient | Authorised GB claim? | What the evidence says |
|---|---|---|
| Caffeine | Yes: contributes to increased alertness (at 75mg per serving) | Well established; watch total daily intake |
| Vitamins B6 and B12 | Yes: contribute to normal psychological function | Helps only if you are short of them |
| Pantothenic acid (B5) | Yes: contributes to normal mental performance | Most diets provide enough |
| Iodine and zinc | Yes: contribute to normal cognitive function | Iodine is low in some UK diets without fish or dairy |
| L-theanine | No | Small studies, often combined with caffeine |
| Lion's mane | No | Small, early human trials with mixed results |
| Rhodiola, ginkgo, bacopa | No | Mixed evidence; some interact with medicines |
What the Studies Show
- Caffeine with L-theanine: in a small trial of 27 adults, 50mg of caffeine with 100mg of L-theanine improved accuracy on an attention-switching task compared with placebo (Owen et al., 2008). Caffeine carries the authorised claim; L-theanine does not.
- Lion's mane: 30 older Japanese adults with mild cognitive impairment scored higher on a cognitive scale after 16 weeks of 3g a day of dried lion's mane than with placebo (Mori et al., 2009). In 41 healthy young adults, 28 days of 1.8g a day showed no clear benefits, and the authors called their findings tentative (Docherty et al., 2023).
- B vitamins: low vitamin B12 can affect memory and thinking (NHS). Topping up helps if you are low; extra on top of enough is unlikely to do more.
Are Focus Gummies Worth It?
They can be a convenient way to take B vitamins or a small amount of caffeine. Check three things:
- The dose of each ingredient. Many gummies list a "focus blend" with no individual amounts.
- The claims. Only authorised wording is allowed. "Unlocks your brain" is not.
- Caffeine content. Add it to your coffee and tea. The NHS advises pregnant women to keep caffeine under 200mg a day.
Safety
Ginkgo can interact with blood thinners, and several herbs interact with antidepressants and other medicines. Avoid mushroom supplements if you are allergic to mushrooms. If you are pregnant, breastfeeding, on medication or have a medical condition, speak to your GP or pharmacist first. If you have ongoing problems with memory or concentration, see your GP rather than self-treating.
Where GUUDIES Fits
GUUDIES is not sold as a nootropic. The Daily Greens+ gummy contains vitamins B6 and B12, which contribute to normal psychological function, pantothenic acid, which contributes to normal mental performance, and iodine and zinc, which contribute to normal cognitive function. The Mushroom Mix gummy lists lion's mane at 1000mg alongside shiitake, chaga, reishi and cordyceps; we make no brain claims for it. The pouch contains no caffeine. Five of the six gummies are vegan; Marine Collagen contains fish. Each gummy has about 0.4g of sugar.
Common Questions
What is the best natural nootropic in the UK?
Caffeine has the strongest evidence and an authorised claim for alertness. B vitamins, iodine and zinc have authorised claims for normal mental or cognitive function. Herbal options have weaker evidence.
Do nootropic gummies work?
They can help if they supply a nutrient you are short of or a meaningful dose of caffeine. No gummy is authorised to claim it improves memory or intelligence.
Is lion's mane a nootropic?
It is often marketed as one, but human studies are small and mixed, and there is no authorised claim for it in Great Britain.
Are nootropics safe?
Most food-based ingredients are well tolerated, but some herbs interact with medicines. Check with your GP or pharmacist first if you take any medication.
Sources
- Owen GN et al. The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutr Neurosci 2008: PubMed
- Mori K et al. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment. Phytother Res 2009: PubMed
- Docherty S et al. The acute and chronic effects of lion's mane mushroom supplementation on cognitive function, stress and mood in young adults. Nutrients 2023: PubMed
- NHS, Vitamin B12 or folate deficiency anaemia: nhs.uk
- GB Nutrition and Health Claims Register: gov.uk
Related Reading
Best Lion's Mane Supplement UK · Lion's Mane Benefits · Mushroom Gummies UK · Mushroom Mix