# How to buy lion's mane in the UK: a label-reading guide

Source: https://lionsmanemushroom.uk/buying-guide/
Author: Jo Calder · Updated 2026-11-03

**Short answer:** Choose a product that says it uses the fruiting body, or a mycelium extract standardised for erinacine A, and states its beta-glucan content from a named test. Avoid 'myceliated grain' and labels that only give 'polysaccharides'. Ask for a recent lab report covering heavy metals and microbes. No health claim for lion's mane is authorised in Great Britain.

## What should a good lion's mane label tell you?

Five things. If a label leaves out the first two, the product is hard to compare with anything, including the trials.

1. **Which part of the mushroom.** "Fruiting body" is clearest. If it says mycelium, it should say how it was grown. See [fruiting body or mycelium](/what-is-lions-mane/fruiting-body-vs-mycelium/).
2. **Beta-glucan content, and the test used.** A figure such as "beta-glucans ≥ 20%" from an enzyme test (often called the Megazyme method) tells you real mushroom fibre is there. "Polysaccharides 30%" does not, because starch counts as a polysaccharide.
3. **Extract type and ratio**, if it is an extract: hot water, alcohol, or both ("dual extract"), and a ratio such as 8:1. The ratio alone says how much mushroom went in, not what came out.
4. **Dose per serving that matches the trials:** 1 to 3 g of fruiting body a day, or an equivalent extract. See [dosage](/how-to-take/dosage/).
5. **A batch number and a way to get the lab report.**

## Which red flags should you look for?

- **"Myceliated grain", oats, brown rice or "full-spectrum" mycelium on grain.** You may be buying mostly starch.
- **Only a "polysaccharide" figure** with no beta-glucan or alpha-glucan breakdown.
- **Health or medical claims.** "Boosts memory", "supports focus" or "nerve regeneration" are not authorised claims for lion's mane in Great Britain, and claims to treat or prevent a disease are banned on food altogether.
- **Very low doses hidden in blends**, such as 100 mg of lion's mane in a "brain complex" with ten other ingredients.
- **No company address in the UK or EU**, and no way to contact the seller.

## What should a lab report cover?

Ask for a certificate of analysis for the batch you are buying, ideally from an independent lab accredited to ISO 17025. It should cover:

| Test | Why it matters |
| --- | --- |
| Beta-glucan and alpha-glucan | Confirms mushroom content and shows how much is starch |
| Heavy metals: lead, cadmium, mercury, arsenic | Mushrooms take up metals from what they grow on |
| Microbiology: moulds, yeasts, E. coli, salmonella | Dried powders can carry microbes if poorly handled |
| Pesticide residues | Especially for products grown or made outside the UK and EU |
| Identity (DNA or chemical fingerprint) | Shows it really is lion's mane |

## What are the UK rules for selling lion's mane?

Lion's mane supplements are sold as foods, so they are covered by food law, not medicines regulation. That means no one checks a product before it goes on sale: the seller is responsible for making sure it is safe and correctly labelled, and local trading standards and environmental health officers enforce the rules.

Health claims on food normally have to be authorised and listed on the GB nutrition and health claims register, and none has been authorised for lion's mane. A group of older claims for plant-based ingredients is still "on hold" awaiting review, which makes enforcement patchy, but no food may claim to treat, prevent or cure a disease. If a UK seller tells you lion's mane treats anxiety, prevents dementia or repairs nerves, it is breaking the rules, and that tells you something about how carefully the rest of the label was written.

## Frequently asked questions

### What is the best lion's mane supplement in the UK?

We do not rank or recommend brands, because we take no money from sellers. The best product is one that tells you which part of the mushroom it uses, gives a beta-glucan figure from a named test, and publishes a recent lab report for contaminants.

### Is organic lion's mane better?

Organic certification covers how it was grown, not how much of the active compounds it contains. It is a reasonable extra but tells you nothing about whether a product is fruiting body or grain-heavy mycelium.

### Can a UK seller say lion's mane improves memory?

Not as a straightforward claim. Health claims on foods normally have to be authorised on the Great Britain nutrition and health claims register, and none has been authorised for lion's mane. Claiming that a food supplement treats or prevents a disease, such as dementia or anxiety, is never allowed.

## References

1. [Great Britain nutrition and health claims (NHC) register. Department of Health and Social Care.](https://www.gov.uk/government/publications/great-britain-nutrition-and-health-claims-nhc-register)
2. [Food supplements: business guidance. Food Standards Agency.](https://www.food.gov.uk/business-guidance/food-supplements)
3. [McCleary BV, Draga A. Measurement of β-glucan in mushrooms and mycelial products. Journal of AOAC International, 2016.](https://pubmed.ncbi.nlm.nih.gov/26957216/)
4. [Windsor C et al. Comparative study of chaga (Inonotus obliquus) dietary supplements using complementary analytical techniques. International Journal of Molecular Sciences, 2025.](https://pubmed.ncbi.nlm.nih.gov/40243601/)
5. [Keerthana CS et al. Unveiling the glucan profile: a comparative study of lion's mane and shiitake mushrooms. Natural Product Research, 2026.](https://pubmed.ncbi.nlm.nih.gov/40407020/)
6. [Szućko-Kociuba I et al. Neurotrophic and neuroprotective effects of Hericium erinaceus. International Journal of Molecular Sciences, 2023.](https://pubmed.ncbi.nlm.nih.gov/37958943/) Calls for standardisation of lion's mane supplements.