PlainVitamins

botanical

Kelp supplements

Half of the 333 kelp supplements in the NIH label database that print an amount list 50 mg or less per serving; the middle half list 20 mg to 100 mg (DSLD version 9.4.0, January 2026). The 30 products whose only supplement ingredient is kelp list a median of 500 mg.

Products listing it
1,070333 print an amount; 732 list it inside a blend without an amount
Median per serving
50 mgmiddle half 20 mg to 100 mg

How much kelp do supplements contain?

The median product lists 50 mg per serving. One in ten lists 5 mg or less, one in ten 490 mg or more. The amount printed most often is 100 mg (54 products).

Products by amount of kelp per serving

333 products, log scale; extreme 0.2% at each end left out of the drawing.

Kelp: products by amount per serving0.3 mg3 mg30 mg300 mg
Kelp: products by amount per serving0.3 mg1 mg3 mg10 mg100 mg1,000 mg
Kelp: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg1,000 mg
Kelp: products by amount per serving0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
Kelp: products by amount per serving0.1 mg0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
100 mg54 Thyroid Support (Vitabase); Acai Heat Avanced Weight Control Formula (Healthy Choice Naturals); Minelyte (Tcentials)
50 mg37 Natural KLB6 (Nature's Bounty); Herbplex (Douglas Laboratories); Herbal Master Blend (Martin Avenue Pharmacy)
38 mg25 Thyroid Support (ViMulti); Actathroid (Nutrients for Health); Thyroid Essential (Healthy Choice Naturals)
15 mg22 ADDtend (Douglas Laboratories); Thyrostim (Musclegen Performance Nutrition); SeraMense plus Probiotics Chocolate (Greens First Female)
500 mg14 Prostate Formula (Vitabase); Nutricleanz (SimplyBest); GenEssentials Greens (Genesis Today)
20 mg13 Super Strength MetaMax (Simply Supplements); Apple Cider Vinegar Formula (New Sun); AM/PM Full Body Cleanse (Greens First Pro)
0.21 mg11 Life's Vitality Multi Vitamin/Mineral Complex (Lee Haney's Nutritional Support Systems); Multi RX (IronMagLabs); Alpha Daily (Optimal Alpha)
10 mg9 Digestive Enzymes (Terra Origin); Menophase (Higher Nature); Razburn (BioSource Labs)
30 mg9 Multi Vitamin (Nature's Way); NZ-Fe Fort (Everyday Health); Promum Diamond Plus (Everyday Health)
150 mg8 Kelp Vinegar Lecithin B6 (VitaCeutical Labs); KVLB Kelp * Vinegar * Lecithin * B6 (Vitamer Laboratories); Klvb-6 (Viva Vitamins)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most kelp?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2017 list a median of 50 mg; those entered in 2025, 45 mg.

Median kelp per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
20172350 mg
20203750 mg
20212831.5 mg
20223250 mg
20234150 mg
20244238 mg
20253745 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing kelp by DSLD product type

Kelp by product typeOther Combinations239Botanical with Nutrients51Non-Nutrient/Non-Botanical22Botanical21
Kelp by product typeOther Combinations239Botanical with Nutrients51Non-Nutrient/Non-Botanical22Botanical21
Kelp by product typeOther Combinations239Botanical with Nutrients51Non-Nutrient/Non-Botanical22Botanical21
Kelp by product typeOther Combinations239Botanical with Nutrients51Non-Nutrient/Non-Botanical22Botanical21
Kelp by product typeOther Combinations239Botanical with Nutrients51Non-Nutrient/Non-Botanical22Botanical21

Brands listing it most: Rise-N-Shine (9), Nature's Way (9), Higher Nature (8), Loomis Enzymes (6), NOW (6), Remedys Nutrition (5), Totally Products (5), Healthy Choice Naturals (5), Vibrant Health (5), NewtonEverett (4).

Every product listing kelp

1,070 products, A to Z by name (page 18 of 22), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

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