PlainVitamins

Kelp Certified 660 mg

by Nature's Way · capsule · 100 capsules

  • Off the market since October 2014 (NIH)
  • UPC 0 33674 14500 5
  • DSLD label 31434
  • Serving 1 capsule
  • 100 servings

Kelp Certified 660 mg by Nature's Way lists 3 ingredients, 3 with an amount per serving of 1 capsule, such as 390 mcg of iron, 400 mcg of iodine and 660 mg of kelp, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on March 25, 2014.

What is in Kelp Certified 660 mg?

Each row as the label prints it, per serving of 1 capsule. 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 Certified 660 mg: Supplement Facts rows against the market (DSLD label 31434, January 2026 release)
IngredientAmount% DVAmong products listing it
Iron390 mcg2%Iron in Kelp Certified 660 mg against 6,910 products0.39 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg0.39 mg

94% of 6,910 products listing iron give more (median 5 mg).

Iodine400 mcg267%Iodine in Kelp Certified 660 mg against 6,382 products400 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg400 mcg

Higher than 97% of 6,382 products listing iodine (median 150 mcg).

Sodium20 mg1%Sodium in Kelp Certified 660 mg against 14,514 products20 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.20 mg

67% of 14,514 products listing sodium give more (median 55 mg).

Kelp660 mgKelp in Kelp Certified 660 mg against 333 products660 mg per serving; the middle half of products list 20 mg to 100 mg, the median 50 mg.660 mg

Higher than 96% of 333 products listing kelp (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 31434 (entered March 25, 2014), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 94% of the 6,910 products that print an amount of iron list more than its 0.39 mg of iron (median 5 mg).
  • Its 400 mcg of iodine is higher than 97% of the 6,382 iodine products that print an amount; 200 list more.
  • Its 660 mg of kelp is higher than 96% of the 333 kelp products that print an amount; 13 list more.

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?

The products whose ingredient lists overlap most with Kelp Certified 660 mg's, rare ingredients counting for more.

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
Recommendation: Take 1 capsule daily, preferably with food. Do not exceed recommended dose.
Warnings
Freshness & safety sealed with printed outer shrink wrap and printed inner seal. Do not use if either seal is broken or missing.
Keep out of reach of children.
Consult a healthcare professional before using if you are pregnant, nursing, or taking a prescribed iodine medication.
Caution: This product should not be taken by persons with known hypersensitivity to iodine or hyperthyroidism.

Source: label statements in DSLD label 31434.

What else is on the label?

Other ingredients: Gelatin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Nature's Way(R).

How many labels does Kelp Certified 660 mg have?

One label is on file, entered on March 25, 2014.

  1. Label 31434 (current) Entered March 25, 2014 · off the market October 24, 2014 · 100 capsules · UPC 0 33674 14500 5

DSLD also links this label to: Kelp Certified 600 mg (image difference, same product), Kelp Certified 600 mg (package size difference, same product), Kelp (package size difference, same product), Kelp (image difference, same product), Kelp (package size difference, same product), Kelp (package size difference, same product), Kelp Whole Thallus 600 mg (package size difference, same product), Kelp Whole Thallus 600 mg (image difference, same product).

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

Who makes it?

The label names Nature's Way Products, Inc. (manufacturer), Springville, Utah. All Nature's Way products.

Where next?