Brand: NOW

Tablet or PillOn Market
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Net Contents

200 Tablet(s)

Serving Size

1 Tablet(s)

Servings Per Container

Not specified

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

7 33739 02680 4

Product Version

Not specified

Market Reference

$7.75 – $199.95· 40 listings
  • Now Kelp 150 mcg

    iHerb4.8(5400)
    $7.95
  • NOW Kelp 325 mcg

    iHerb4.8(2200)
    $12.24
  • NOW Foods Kelp 150 mcg

    NOW4.8(81)
  • Now Organic Kelp Powder

    Bulk Apothecary4.8(33)
    $9.21
  • NOW Foods Organic Kelp Powder 8 oz

    iHerb4.7(633)
    $10.40
  • NOW Foods Pure Kelp Powder

    Dr. Ruth Roberts4.8(33)
    $16.49
  • (2 pack) NOW Supplements, Kelp 150 mcg of Natural Iodine, Easier to Swallow Tablet, Super Green, 200 Tablets, Beige

    Walmart - Fruitful Yield4.8(81)
    $21.92
  • Now Foods Kelp 150mcg 200 Tablets

    Moja lekarna d.o.o.5.0(4)
    $17.96

Where to Buy Locally

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Research & Studies

  • Effects of Daily Kelp (Laminaria japonica) Intake on Body Composition, Serum Lipid Levels, and Thyroid Hormone Levels in Healthy Japanese Adults: A …

    S Aoe, C Yamanaka, H Ohtoshi, F Nakamura… - Marine drugs, 2021 - mdpi.com

    … In a parallel, double-blind, placebo-controlled study, we randomly assigned 48 overweight (BMI 25–30 kg/m 2 ) subjects to either a placebo supplement or a kelp supplement (6 g kelp …

    202143 citations
  • Commercially available kelp and seaweed products–valuable iodine source or risk of excess intake?

    I Aakre, DD Solli, MW Markhus… - Food & Nutrition …, 2021 - pmc.ncbi.nlm.nih.gov

    … now … supplements, such supplements may pose a health risk. Others have advised against the use of macroalgae-containing dietary supplements, and a review of iodine supplement …

    202192 citations
  • What endocrinologists should know about iodine: Population deficiency, individual excess and misinformation in the United Kingdom

    PN Taylor, M Prentice, S Bath, E Combet… - Clinical …, 2026 - Wiley Online Library

    … resets’ and kelp‐based supplements that deliver supraphysiological … Endocrinologists now face a dual challenge: widespread … supplements represents a simple, equitable public‐health …

    2026
  • Effects of kelp supplementation on thyroid function in euthyroid subjects

    CD Clark, B Bassett, MR Burge - Endocrine Practice, 2003 - Elsevier

    … on thyroid function, we determined the short-term effects of ingestion of two different doses of supplemental dietary kelp on healthy subjects for 4 weeks. We hypothesized that the …

    200375 citations
  • Peril of the Shallows?: Elevated Arsenic in Kelp Supplements

    C Washam - Environmental Health Perspectives, 2007 - pmc.ncbi.nlm.nih.gov

    … kelp is a nutritional supplement and not a drug, the FDA does not require manufacturers to demonstrate safety or efficacy. Now … The researchers sent the patient’s kelp supplement, …

    20072 citations
  • Methylmercury and IQ: Dose–Response Estimate of Prenatal Effect

    VJ Brown - Environmental Health Perspectives, 2007 - pmc.ncbi.nlm.nih.gov

    … Now researchers at the University of California, Davis, report the case of a woman who … ’s kelp supplement, along with several other brands purchased from local health food stores, to …

    20071 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2017-05-24. DSLD Label ID: 73590. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.