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All supplements

Whole-food powders & natural products

Sea moss

A red seaweed, as gel, capsules or powder. It adds minerals, especially iodine – the amount varies a lot, so too much is possible.

20 products from US online stores, sorted by what 1,000 mg of sea moss costs – not by the price per pack.

6.2¢Lowest cost
per 1,000 mg sea moss

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

What does 1,000 mg mean?

sea moss per serving in most of the products we checked
300–1,200 mgsea moss per serving in most of the products we checked
  • 1,000 mg is a fixed amount to compare by: half of the 20 products we checked have up to 500 mg per serving, the other half more.
  • There’s no official daily amount for sea moss.

We compare by 1,000 mg only so products line up – it’s not a recommendation. Not medical advice.

Where products miss quality points

How the 20 products score

  • Very good 90+: 1
  • Good 75+: 16
  • Fair 60+: 3
  • Low under 60: 0
have no seal from an independent testing program
95%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 3 whose label says “third-party tested”
hide amounts in a “proprietary blend”
15%hide amounts in a “proprietary blend”5 of 20 transparency points – you only see the total

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 1,000 mg. Pick a size above to compare packs that are alike.

Sort by

20 products · cheapest per 1,000 mg sea moss first

  1. Rank 1

    Nutricost

    Organic Irish Sea Moss Powder, Unflavored

    Powder

    85Good qualityPacked in USA
    6.2¢

    per 1,000 mg

    Lowest

    Pack
    $27.95454 g (1 lb)454 servings
    Sea moss per serving
    1,000 mgin 1 g
    Pack lasts
    454 daysif you take 1,000 mg a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  2. Rank 2

    Nutricost

    Organic Irish Moss Powder

    Powder

    80Good qualityCountry not stated
    6.8¢

    per 1,000 mg

    11% more

    Pack
    $30.97454 g (1 lb)454 servings
    Sea moss per serving
    1,000 mgin 1 g
    Pack lasts
    454 daysif you take 1,000 mg a day
    nutricost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  3. Rank 3

    Nutricost

    Irish Sea Moss

    Capsules

    85Good qualityMade in USA
    $0.13

    per 1,000 mg

    114% more

    Pack
    $18.95240 capsules120 servings
    Sea moss per serving
    1,200 mgin 2 capsules
    Pack lasts
    120 daysif you take 2 capsules (1,200 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  4. Rank 4

    BareOrganics

    Organic Irish Moss Powder

    Powder

    80Good qualityMade in USA
    $0.13

    per 1,000 mg

    115% more

    Pack
    $29.99227 g (8 oz)28 servings
    Sea moss per serving
    8,000 mgin 8 g
    Pack lasts
    227 daysif you take 1,000 mg a day
    bareorganics.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  5. Rank 5

    Double Wood Supplements

    Irish Sea Moss

    Capsules

    80Good qualityMade in USA
    $0.18

    per 1,000 mg

    200% more

    Pack
    $19.95180 capsules90 servings
    Sea moss per serving
    1,200 mgin 2 capsules
    Pack lasts
    90 daysif you take 2 capsules (1,200 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  6. Rank 6

    Double Wood Supplements

    Irish Sea Moss Supplement

    Capsules

    80Good qualityMade in USA
    $0.18

    per 1,000 mg

    200% more

    Pack
    $19.95180 capsules90 servings
    Sea moss per serving
    1,200 mgin 2 capsules
    Pack lasts
    90 daysif you take 2 capsules (1,200 mg) a day
    doublewoodsupplements.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  7. Rank 7

    Swanson Vitamins

    Full Spectrum Irish Moss

    Capsules

    80Good qualityCountry not stated
    $0.30

    per 1,000 mg

    380% more

    Pack
    $7.0960 capsules
    Sea moss per serving
    400 mgin 1 capsule
    Pack lasts
    20 daysif you take 3 capsules (1,200 mg) a day
    swansonvitamins.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  8. Rank 8

    Swanson Vitamins

    Full Spectrum Irish Moss, 400 mg

    Capsules

    80Good qualityCountry not stated
    $0.33

    per 1,000 mg

    428% more

    Pack
    $7.8060 capsules
    Sea moss per serving
    400 mgin 1 capsule
    Pack lasts
    20 daysif you take 3 capsules (1,200 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  9. Rank 9

    Country Farms

    Irish Sea Moss

    Capsules

    65Fair qualityMade in USA
    $0.38

    per 1,000 mg

    513% more

    Pack
    $16.9990 capsules
    Sea moss per serving
    500 mgin 1 capsule
    Pack lasts
    45 daysif you take 2 capsules (1,000 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  10. Rank 10

    Solaray

    True Herbs, Irish Sea Moss, 500 mg

    Capsules

    80Good qualityCountry not stated
    $0.50

    per 1,000 mg

    718% more

    Pack
    $25.19100 capsules
    Sea moss per serving
    500 mgin 1 capsule
    Pack lasts
    50 daysif you take 2 capsules (1,000 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  11. Rank 11

    Her Own

    Irish Sea Moss

    Capsules

    65Fair qualityMade in USA
    $0.63

    per 1,000 mg

    928% more

    Pack
    $18.9960 capsules
    Sea moss per serving
    500 mgin 1 capsule
    Pack lasts
    30 daysif you take 2 capsules (1,000 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  12. Rank 12

    MaryRuth's

    Organic Sea Moss Liquid Extract

    Liquid

    100Very good qualityCountry not stated
    $0.74

    per 1,000 mg

    1,101% more

    Pack
    $24.9529.6 ml (1 fl oz)30 servings
    Sea moss per serving
    1,140 mgin 1 ml
    Pack lasts
    33 daysif you take 1,000 mg a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  13. Rank 13

    Maju Superfoods

    Purple Sea Moss

    Capsules

    85Good qualityCountry not stated
    $0.93

    per 1,000 mg

    1,415% more

    Pack
    $27.9960 capsules
    Sea moss per serving
    500 mgin 1 capsule
    Pack lasts
    30 daysif you take 2 capsules (1,000 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  14. Rank 14

    Maju Superfoods

    Sea Moss Capsules - MAJU Purple Chondrus Crispus Wildcrafted

    Capsules

    80Good qualityCountry not stated
    $0.93

    per 1,000 mg

    1,415% more

    Pack
    $27.9960 capsules
    Sea moss per serving
    500 mgin 1 capsule
    Pack lasts
    30 daysif you take 2 capsules (1,000 mg) a day
    majusuperfoods.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  15. Rank 15

    Zhou Nutrition

    Irish Sea Moss Gummies, Green Apple

    Gummies

    80Good qualityCountry not stated
    $1.40

    per 1,000 mg

    2,181% more

    Pack
    $24.5750 gummies25 servings
    Sea moss per serving
    700 mgin 2 gummies
    Pack lasts
    16 daysif you take 3 gummies (1,050 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  16. Rank 16

    Force Factor

    Superior Sea Moss Soft Chews Premium Irish Sea Moss to Support Energy Immunity Gut Health & Skin Health Non-GMO Gluten Free Salted Caramel Flavor

    Gummies

    80Good qualityMade in USA
    $1.67

    per 1,000 mg

    2,606% more

    Pack
    $24.9960 gummies30 servings
    Sea moss per serving
    500 mgin 2 gummies
    Pack lasts
    15 daysif you take 4 gummies (1,000 mg) a day
    forcefactor.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  17. Rank 17

    Codeage

    Sea Moss Gummies, Strawberry

    Gummies

    80Good qualityMade in USA
    $2.22

    per 1,000 mg

    3,508% more

    Pack
    $19.9960 gummies30 servings
    Sea moss per serving
    300 mgin 2 gummies
    Pack lasts
    8 daysif you take 7 gummies (1,050 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  18. Rank 18

    Codeage

    Sea Moss Gummies

    Gummies

    80Good qualityCountry not stated
    $2.22

    per 1,000 mg

    3,508% more

    Pack
    $19.9960 gummies30 servings
    Sea moss per serving
    300 mgin 2 gummies
    Pack lasts
    8 daysif you take 7 gummies (1,050 mg) a day
    codeage.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  19. Rank 19

    Youtheory

    Irish Sea Moss Zero Sugar Gummies, Berry

    Gummies

    65Fair qualityCountry not stated
    $9.00

    per 1,000 mg

    14,514% more

    Pack
    $26.9960 gummies30 servings
    Sea moss per serving
    100 mgin 2 gummies
    Pack lasts
    3 daysif you take 20 gummies (1,000 mg) a day
    youtheory.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

  20. Rank 20

    MaryRuth's

    Sea Moss Gummies, Green Apple

    Gummies

    80Good qualityCountry not stated
    $17.47

    per 1,000 mg

    28,272% more

    Pack
    $26.2060 gummies30 servings
    Sea moss per serving
    50 mgin 2 gummies
    Pack lasts
    1 dayif you take 40 gummies (1,000 mg) a day
    vitacost.com (opens in a new tab)

    Checked Nov 1, 2026 · Label

Filters

Good to know

Fact
28,272%more per 1,000 mg for the most expensive product than for the cheapest.
Fact
2,181%more per 1,000 mg for the cheapest gummies than for the cheapest powder.

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