Other compounds
Ergothioneine
An amino acid found mostly in mushrooms. The body stores it in many organs – studied as an antioxidant, research is still early.
9 products from US online stores, sorted by what 10 mg of ergothioneine costs – not by the price per pack.
5.3¢Lowest cost
per 10 mg ergothioneine
- Prices checked Nov 1, 2026, US
- No paid placements
What does 10 mg mean?
- ergothioneine per serving in the 9 products we checked
- 5–30 mgergothioneine per serving in the 9 products we checked
- 10 mg is a fixed amount to compare by.
- There’s no official daily amount for ergothioneine.
We compare by 10 mg only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 9 products score
- Very good 90+: 0
- Good 75+: 9
- Fair 60+: 0
- Low under 60: 0
- have no seal from an independent testing program
- 9 of 9have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 1 whose label says “third-party tested”
The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.
We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works
Pack size
Compare packs of a similar size.
All sizes in one list can affect the results – big packs usually cost less per 10 mg. Pick a size above to compare packs that are alike.
9 products · cheapest per 10 mg ergothioneine first
- Rank 1
Nutricost
L-Ergothioneine Supplement
Capsules
80Good qualityMade in USA5.3¢per 10 mg
Lowest
- Pack
- $18.97120 capsules
- Ergothioneine per serving
- 30 mgin 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule (30 mg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
Toniiq
L-Ergothioneine 30MG
Capsules
80Good qualityCountry not stated7.4¢per 10 mg
40% more
- Pack
- $19.9790 capsules
- Ergothioneine per serving
- 30 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (30 mg) a day
toniiq.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Toniiq
L-Ergothioneine, 30 mg
Capsules
80Good qualityCountry not stated7.6¢per 10 mg
45% more
- Pack
- $20.5790 capsules
- Ergothioneine per serving
- 30 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (30 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Double Wood Supplements
L-Ergothioneine Supplement
Capsules
80Good qualityCountry not stated$0.11per 10 mg
110% more
- Pack
- $19.9560 capsules
- Ergothioneine per serving
- 30 mgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (30 mg) a day
doublewoodsupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
LifeSeasons
L-Ergothioneine
Capsules
80Good qualityCountry not stated$0.13per 10 mg
153% more
- Pack
- $24.0060 capsules
- Ergothioneine per serving
- 30 mgin 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule (30 mg) a day
lifeseasons.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
California Gold Nutrition
Ergothioneine, 25 mg
Capsules
80Good qualityMade in USA$0.15per 10 mg
178% more
- Pack
- $32.9590 capsules
- Ergothioneine per serving
- 25 mgin 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule (25 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
California Gold Nutrition
Ergothioneine, 5 mg
Capsules
80Good qualityCountry not stated$0.40per 10 mg
657% more
- Pack
- $17.9490 capsules
- Ergothioneine per serving
- 5 mgin 1 capsule
- Pack lasts
- 45 daysif you take 2 capsules (10 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
ProHealth Longevity
L-Ergothioneine - 25 mg
Capsules
85Good qualityCountry not stated$0.40per 10 mg
658% more
- Pack
- $29.9630 capsules
- Ergothioneine per serving
- 25 mgin 1 capsule
- Pack lasts
- 30 daysif you take 1 capsule (25 mg) a day
prohealth.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
ProHealth Longevity
Ergothioneine, 25 mg
Capsules
80Good qualityCountry not stated$0.53per 10 mg
911% more
- Pack
- $39.9530 capsules
- Ergothioneine per serving
- 25 mgin 1 capsule
- Pack lasts
- 30 daysif you take 1 capsule (25 mg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 911%more per 10 mg for the most expensive product than for the cheapest.
How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check
The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.
How we calculate
Cost per dose = price ÷ (servings × amount per serving) × comparison amount. Example: $119.99 for 74 servings with 24 g of protein each is 1,776 g of protein. $119.99 ÷ 1,776 g × 30 g = $2.03 per 30 g of protein.
Found a mistake or a product we should add? Email us