Do mushrooms have more protein than vegetables?

They are in the same range as most vegetables — around 2–3g per 100g. Pulses, eggs, dairy, meat and fish are the foods that actually move your protein count.

Can I count mushroom supplements towards my protein intake?

No. A serving is under a gram of extract, so the protein it contains is negligible.

What are mushrooms good for, then?

Fibre including beta-glucans, very few calories, B vitamins, and traditional-use varieties like Lion's Mane and Cordyceps. Our FOCUS products pair them with Vitamin B12, which contributes to normal psychological function.

The ingredient desk · Last updated 7 October 2026

Do mushrooms have protein? What's actually in a mushroom

Do mushrooms have protein?

The short answer

Yes, but not much. Fresh mushrooms contain roughly 2–3g of protein per 100g — similar to a courgette, well below an egg (about 13g per 100g) or cooked lentils (about 9g). A mushroom supplement is not a protein source either: a 600mg Lion's Mane capsule contains only milligrams of it. What mushrooms actually offer is different — dietary fibre including beta-glucans, B vitamins, very few calories, and traditional-use varieties like Lion's Mane and Cordyceps. If you want an approved UK claim, look to the nutrients alongside them: Vitamin B12 contributes to normal psychological function and to the reduction of tiredness and fatigue.

Protein compared (typical values, per 100g)

Protein compared (typical values, per 100g)
	Protein	What it's really for
Fresh mushrooms	c. 2–3g	Fibre, beta-glucans, umami flavour, very few calories
Eggs	c. 13g	A complete protein source
Cooked lentils	c. 9g	Protein plus fibre
Chicken breast	c. 31g	Lean protein
Mushroom supplement (per serving)	Milligrams, not grams	Concentrated mushroom extract, not protein

What mushrooms actually offer

What mushrooms actually offer
	The honest version
Fibre and beta-glucans	Mushroom cell walls are rich in beta-glucans, a soluble dietary fibre
Low calorie	Roughly 20–25 kcal per 100g fresh
B vitamins	Fresh mushrooms contain B vitamins; some products add B12 with an approved claim
Traditional-use varieties	Lion's Mane, Cordyceps, Reishi and Maitake have centuries of traditional use and ongoing research, but no authorised UK health claim

The trade-offs

Mushrooms as a food

Few calories, real fibre including beta-glucans
Cook into almost anything
Vegan and cheap in season

Modest protein — 2–3g per 100g
Will not move your protein count

Mushroom supplements (Grass & Co.)

Concentrated fruiting body extract
Paired with nutrients that carry approved claims, like B12 and D3
Published batch certificates

Not a protein source
The mushroom ingredients themselves have no authorised UK health claim

The verdict

Mushrooms are not a protein food — they are a fibre and tradition food. Count eggs, dairy, pulses or a protein powder for protein, and enjoy mushrooms for everything else they bring.

Where Grass & Co. loses

If you are counting protein, mushrooms will not move the number, and we do not sell a protein product. For the gym specifically, creatine carries an authorised performance claim that no mushroom does.

Mentioned in this piece

Questions people ask

Do mushrooms have more protein than vegetables?: They are in the same range as most vegetables — around 2–3g per 100g. Pulses, eggs, dairy, meat and fish are the foods that actually move your protein count.
Can I count mushroom supplements towards my protein intake?: No. A serving is under a gram of extract, so the protein it contains is negligible.
What are mushrooms good for, then?: Fibre including beta-glucans, very few calories, B vitamins, and traditional-use varieties like Lion's Mane and Cordyceps. Our FOCUS products pair them with Vitamin B12, which contributes to normal psychological function.

More comparisons

Grass & Co. products are food supplements and are not intended to diagnose, treat, cure or prevent any disease. Do not exceed the stated dose. Most products are for adults; CBD is for adults only.