PlainVitamins

Kelp

by Swanson · tablet or pill · 250 tablets

  • On the market (NIH)
  • UPC 0 87614 11745 4
  • DSLD label 337894
  • Serving 1 tablet
  • 250 servings

Kelp by Swanson lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 225 mcg of iodine and 56 mg of atlantic kelp. Its current label entered the NIH Dietary Supplement Label Database on August 22, 2025.

What is in Kelp?

Each row as the label prints it, per serving of 1 tablet. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Kelp: Supplement Facts rows against the market (DSLD label 337894, January 2026 release)
IngredientAmount% DVAmong products listing it
Iodineas Kelp225 mcg150%Iodine in Kelp against 6,382 products225 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg225 mcg

Higher than 90% of 6,382 products listing iodine (median 150 mcg).

Atlantic Kelpas Ascophyllum nodosumstandardized to 0.4% iodine56 mgKelp in Kelp against 333 products56 mg per serving; the middle half of products list 20 mg to 100 mg, the median 50 mg.56 mg

Higher than 56% of 333 products listing kelp (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 337894 (entered August 22, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

6 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Suggested use: As a dietary supplement, take one tablet per day with water.
Warnings
Do not exceed recommended dose.
Warning: For adults only. Keep out of reach of children.
Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.
Do not use if seal is broken.
May contain crustacean shellfish (lobster, crab and shrimp).
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 337894.

What else is on the label?

Other ingredients: Dicalcium Phosphate, Calcium Carbonate, Microcrystalline Cellulose, Stearic Acid, Silica, Magnesium Stearate, Acacia, Maltodextrin.

How many labels does Kelp have?

3 labels are on file under this name since February 25, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 337894 (current) Entered August 22, 2025 · on the market · 250 tablets · UPC 0 87614 11745 4
  2. Label 203844 Entered July 24, 2019 · on the market · 250 tablets · UPC 0 87614 01337 4
  3. Label 187624 Entered February 25, 2019 · on the market · 250 tablets · UPC 0 87614 11745 4

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Swanson Health Products (distributor), Fargo, ND. All Swanson products.

Where next?