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Plant compounds

Sulforaphane (broccoli sprout extract)

A substance from broccoli sprouts. Studied for the cells’ own protection against damage – studies in people are small.

8 products from US online stores, sorted by what 10 mg of sulforaphane costs – not by the price per pack.

$0.17Lowest cost
per 10 mg sulforaphane

  • Prices checked Nov 1, 2026, US
  • No paid placements

What does 10 mg mean?

sulforaphane per serving in the 8 products we checked
0.25–20 mgsulforaphane per serving in the 8 products we checked
  • 10 mg is a fixed amount to compare by.
  • There’s no official daily amount for sulforaphane.

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 8 products score

  • Very good 90+: 0
  • Good 75+: 8
  • Fair 60+: 0
  • Low under 60: 0
have no seal from an independent testing program
8 of 8have 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.

Pack 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.

Sort by

8 products · cheapest per 10 mg sulforaphane first

  1. Rank 1

    Double Wood Supplements

    Sulforaphane

    Capsules

    75Good qualityMade in USA
    $0.17

    per 10 mg

    Lowest

    Pack
    $19.95120 capsules60 servings
    Sulforaphane per serving
    20 mgin 2 capsules
    Pack lasts
    120 daysif you take 1 capsule (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  2. Rank 2

    Double Wood Supplements

    Sulforaphane Supplement

    Capsules

    75Good qualityMade in USA
    $0.17

    per 10 mg

    Lowest

    Pack
    $19.95120 capsules60 servings
    Sulforaphane per serving
    20 mgin 2 capsules
    Pack lasts
    120 daysif you take 1 capsule (10 mg) a day
    doublewoodsupplements.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  3. Rank 3

    Source Naturals

    Broccoli Sprouts Extract, 250 mg

    Tablets

    75Good qualityCountry not stated
    $2.15

    per 10 mg

    1,195% more

    Pack
    $25.84120 tablets60 servings
    Sulforaphane per serving
    2 mgin 2 tablets
    Pack lasts
    12 daysif you take 10 tablets (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  4. Rank 4

    Source Naturals

    Broccoli Sprouts Extract, 250 mg

    Tablets

    75Good qualityCountry not stated
    $2.23

    per 10 mg

    1,243% more

    Pack
    $13.4060 tablets30 servings
    Sulforaphane per serving
    2 mgin 2 tablets
    Pack lasts
    6 daysif you take 10 tablets (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  5. Rank 5

    Source Naturals

    Broccoli Sprouts Extract

    Tablets

    75Good qualityCountry not stated
    $2.40

    per 10 mg

    1,346% more

    Pack
    $7.2130 tablets15 servings
    Sulforaphane per serving
    2 mgin 2 tablets
    Pack lasts
    3 daysif you take 10 tablets (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  6. Rank 6

    Swanson Vitamins

    Sulforaphane from Broccoli Sprout Extract, 400 mcg

    Capsules

    80Good qualityCountry not stated
    $4.66

    per 10 mg

    2,705% more

    Pack
    $11.1960 capsules
    Sulforaphane per serving
    0.4 mgin 1 capsule
    Pack lasts
    2 daysif you take 25 capsules (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  7. Rank 7

    Swanson Vitamins

    Sulforaphane from Broccoli Sprout Extract

    Capsules

    80Good qualityCountry not stated
    $4.66

    per 10 mg

    2,705% more

    Pack
    $11.1960 capsules
    Sulforaphane per serving
    0.4 mgin 1 capsule
    Pack lasts
    2 daysif you take 25 capsules (10 mg) a day
    swansonvitamins.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  8. Rank 8

    Nutricost

    Sulforaphane Glucosinolate, 50 mg

    Capsules

    80Good qualityMade in USA
    $8.93

    per 10 mg

    5,269% more

    Pack
    $26.78120 capsules
    Sulforaphane per serving
    0.25 mgin 1 capsule
    Pack lasts
    3 daysif you take 40 capsules (10 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

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Good to know

Fact
5,269%more per 10 mg for the most expensive product than for the cheapest.
Fact
1,195%more per 10 mg for the cheapest tablets than for the cheapest capsules.

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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