Mushroom Supplements UK: How to Read a Lion's Mane, Reishi or Cordyceps Label

Mushroom supplements are one of the fastest-growing corners of the UK vitamins aisle, and one of the hardest to shop sensibly. Two capsules can both say "1000 mg lion's mane", cost £9 and £39, and contain genuinely different things. This guide is about the four label details that explain the gap.

One thing first, because it shapes everything below: in Great Britain there are no authorised health claims for any medicinal or functional mushroom. Not for lion's mane, not for reishi, not for cordyceps, chaga, maitake, shiitake or turkey tail. That means a compliant UK label legally cannot tell you what the product is for. Retailers and brands who follow the rules will describe the ingredient and stop there. If a listing tells you what a mushroom will do to your brain, immune system or stamina, that is a sign the seller is not following GB rules — not a sign the product is better.

So you are left comparing composition. Here is how.

1. Fruiting body or mycelium on grain?

This is the single biggest difference between two products at the same milligram figure.

Fruiting body

The mushroom itself — the part you would recognise as a mushroom. It is grown, harvested, dried and milled or extracted. It is more expensive to produce, and it is what most buyers assume they are getting.

Mycelium on grain (MOG)

The root-like network is grown on a grain substrate, usually rice or oats, and the whole thing — mycelium plus the grain it grew on — is dried and powdered together. It is much cheaper. The finished powder contains a substantial proportion of starch from the grain, which is why MOG products can show a high total weight and a low beta-glucan figure.

Neither is a scandal, but they are not the same product at the same price. UK labels are not always explicit, so look for the words fruiting body, fruit body or sporophore. If a label only says "mycelial biomass" or "mushroom powder" with no part specified, you cannot tell.

2. Extract or raw powder — and what the ratio means

A raw powder is dried, milled mushroom. An extract has been through hot water, alcohol, or both, and then concentrated.

Extracts are labelled with a ratio: 8:1, 10:1, 15:1. That means the stated weight of raw material was reduced to one part finished extract — so 10:1 implies 10 kg of dried mushroom produced 1 kg of extract. A 500 mg capsule of 10:1 extract is therefore described as equivalent to 5,000 mg of raw mushroom, and you will often see the larger number printed on the front with the small print underneath.

Two cautions. Ratios are self-declared and there is no standard method behind them, so a 20:1 from one brand and a 10:1 from another are not directly comparable. And a bigger ratio is not automatically better — it concentrates whatever the process pulls out, and different processes pull out different things. Hot-water extraction is the traditional route for the polysaccharide fraction; dual extraction adds an alcohol step for the compounds water leaves behind.

3. The beta-glucan number is the one that matters

If a brand is confident in its material, it prints a beta-glucan percentage. This is the closest thing the category has to a quality marker, because it cannot be inflated by adding grain.

Watch for the switch: some labels quote polysaccharides instead. Polysaccharide is a much broader category that includes starch — so a mycelium-on-grain product can honestly claim a very high polysaccharide percentage while carrying very little of the fungal beta-glucan people are actually buying. If the label says polysaccharides and not beta-glucans, treat the number as uninformative rather than impressive.

A specified beta-glucan figure, ideally with the test method named, tells you more than any milligram total on the front of the tub.

4. Format: capsules, powders, tinctures and coffee

Format changes cost per serving more than most people expect.

• Capsules — fixed dose, no taste, easiest to be consistent with. Olimp Lion's Mane, Osavi Reishi, Osavi Cordyceps and NOW Foods Cordyceps all sit here.
• Powders and blends — flexible dosing and usually cheaper per gram, but you have to like the taste or hide it in something. Applied Nutrition Mushroom Superblend and KIKI Health Mushroom Cacao are examples of the two ends of that.
• Tinctures — liquid extracts in a dropper bottle. Convenient, and usually the dearest route per gram of mushroom.
• Multi-mushroom complexes — Bulk Mushroom Complex or Feel Supreme Mushroom Blend put several species in one capsule. Good for variety, worse for knowing how much of any single one you are getting — six species in a 500 mg capsule is not much of any of them.

Higher-specification single extracts such as KIKI Health Reishi Extract cost more per capsule and tell you more about what is in them. That is usually the trade.

How to compare two products in sixty seconds

1. Find the part used. Fruiting body, mycelium, or unstated.
2. Find whether it is an extract, and at what ratio.
3. Find the beta-glucan percentage — not the polysaccharide percentage.
4. Work out cost per day at the serving on the back, not cost per tub.

If two products match on the first three, buy the cheaper one. If one of them is silent on all three and the other is specific, you have your answer regardless of price.

Sensible expectations and safety

Culinary and functional mushrooms are foods, and are sold in the UK as food supplements rather than medicines. As with any supplement, follow the serving on the label, do not treat a capsule as a substitute for eating and sleeping properly, and speak to a pharmacist or doctor first if you take prescribed medication, are pregnant or breastfeeding, or have a mushroom allergy.

Novel food rules also apply in Great Britain, and some fungal ingredients and extracts are restricted or require authorisation. A reputable brand will not be selling anything that falls foul of that, which is another argument for buying established lines over whatever is trending.

Have a look

Single extracts, blends, powders and tinctures are together in our Mushrooms & Adaptogens range, which sits inside the wider Vitamins & Health section. If you found the label detail here useful, our guide to reading a supplement label without the marketing spin applies the same approach across the rest of the aisle, and our ashwagandha guide covers the other big name in this category.

A quick note

This article is general information, not medical or nutritional advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle, and should not be used to prevent or treat any illness. Always read the product label, do your own research, and speak to a qualified doctor, pharmacist or registered nutritionist before starting a new supplement — especially if you are pregnant, breastfeeding, under 18, taking medication or managing a health condition.