Herbs & botanicals

Horse chestnut seed extract

Extract from horse chestnut seeds. Taken for the veins in the legs – studies look fairly good. Never eat the raw seeds.

16 products from US online stores, sorted by what 300 mg of horse chestnut extract costs – not by the price per pack.

7.1¢Lowest cost
per 300 mg horse chestnut extract

Prices checked Nov 1, 2026, US
No paid placements

What does 300 mg mean?

horse chestnut extract per serving in most of the products we checked: 200–700 mghorse chestnut extract per serving in most of the products we checked

300 mg is about one serving: half of the 16 products we checked have up to 300 mg per serving, the other half more.
There’s no official daily amount for horse chestnut extract.

We compare by 300 mg only so products line up – it’s not a recommendation. Not medical advice.

Where products miss quality points

How the 16 products score

Very good 90+: 0
Good 75+: 14
Fair 60+: 2
Low under 60: 0

have no seal from an independent testing program: 16 of 16have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 2 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

Good to know

Fact: 487%more per 300 mg for the most expensive product than for the cheapest.
Fact: 192%more per 300 mg for the cheapest liquid than for the cheapest tablets.

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.

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Horse chestnut seed extract

What does 300 mg mean?

Where products miss quality points

Pack size

Horse Chestnut - Standardized

Horse Chestnut

Horse Chestnut Extract 300 mg

Horse Chestnut

Full Spectrum Horse Chestnut

Horse Chestnut, 200 mg

Horse Chestnut Extract, Standardized

Horse Chestnut Extract

Horse Chestnut Extract, 250 mg

Horse Chestnut Extract - Standardized

Horse Chestnut, 250 mg

Horse Chestnut Vein Strength, 705 mg

Horse Chestnut

Horse Chestnut Vein Strength

Venotone, Standardized Horse Chestnut

Horse Chestnut

Good to know