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Kelp 325 mcg

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(443 ratings)
Iodine 325 mcg
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Score79
The clear iodine yield is useful, but natural-source uncertainty and a relatively high dose limit routine appeal.
How scoring works
Quantity:240 Tablet(s) • (240 servings)
Goals:
Energy
Metabolism Boost

Score 79

The clear iodine yield is useful, but natural-source uncertainty and a relatively high dose limit routine appeal.
How scoring works
$11.95($0.04 per serving)
Walmart
$ 11.95
iHerb
$ 11.95
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Analysis

A 325 mcg elemental iodine yield is stated clearly despite the natural kelp source. The single-tablet format is convenient for people who specifically want marine-derived iodine.

No information is supplied about kelp standardization, batch consistency, or contaminant screening. The dose is more than twice a common maintenance amount and may be unnecessary when dietary iodine is adequate.

Users with a defined reason for higher kelp intake may find it practical. For everyday supplementation, a lower amount from a named mineral salt offers more predictable dosing.

Who is it for
  • People who prefer kelp-based supplements
  • Adults following a defined iodine plan
  • Users wanting a single-ingredient tablet
Best for
  • Marine-source iodine supplementation
  • Focused above-maintenance intake
  • Long-serving tablet use

Pros

  • Discloses elemental iodine amount
  • Simple tablet format
  • Good value per serving

Cons

  • Kelp consistency is not documented
  • No purity information is supplied
  • Amount is high for maintenance

Warnings

  • The 325 mcg serving may disrupt thyroid function in susceptible users, especially when combined with iodine-rich foods.
  • Thyroid disease, levothyroxine use, antithyroid drugs, or amiodarone make unsupervised iodine supplementation inappropriate.
  • The supplied information does not establish contaminant screening for the kelp source.

Nutrient quality

75 High impact

Kelp is a usable whole-food iodine source, but purity and harvest-region details are absent. The iodine amount sits above ordinary maintenance needs, while extra iodine may disturb thyroid function in susceptible people or when combined with other iodine sources.

Ingredient transparency

77 High impact

The iodine yield and kelp source are shown, but natural-source consistency is not documented. Serving totals are apparent, but full directions and inactive ingredients are not supplied.

Customer satisfaction

69 High impact

The supplied average rating is exceptionally strong. A substantial rating base gives the average reasonable reliability, while complaint and firsthand experience details are unavailable.

Value for money

95 Highest impact

Formula quality supports the asking position well. The serving value is highly competitive within the category.

Report analysis

Goals

Energy
Impact
High effect
B Goal FitB- Strength of SupportD- CoverageA- Formula Quality
Iodine · 325 mcg

Iodine from kelp supports thyroid hormone production and therefore helps maintain normal metabolic rate. It is most useful when iodine intake is low, not as a direct alertness or stamina ingredient.

The 325 mcg amount is transparent but above ordinary maintenance needs, while kelp purity and iodine consistency are not described. People with thyroid disease or additional iodine intake should avoid stacking it because excess iodine may disturb thyroid function.

Study evidence
Iodine Adverse 3 studies
Metabolism Boost
Impact
High effect
C Goal FitC+ Strength of SupportD+ CoverageA- Formula Quality

Iodine can restore normal thyroid hormone production when intake is inadequate. It is unlikely to raise metabolism when iodine status is already sufficient.

The amount is disclosed, but kelp is less predictable than a standardized mineral source. Excess iodine can disrupt thyroid function in susceptible people, especially those with autoimmune thyroid disease.

Study evidence
Iodine Mixed 17 studies

Ingredients

IngredientAmount per serving
Iodine (Kelp)
325 mcg
Gluten Free Adults 18–50
Report overview
Iodine (Kelp) · 325 mcg OverallScore80
C+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyA+ Value

Kelp provides a usable whole-food iodine source, though its purity is uncertain because no organic status or harvest region is given. The clearly stated dose is above the preferred daily-maintenance range but remains below the adult upper limit. A one-tablet serving and very low cost make it convenient and economical.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Association of radioactive iodine treatment with survivorship symptoms and primary care utilisation in women of reproductive age with thyroid cancer: a retrospective cohort study.
    Devanarayan P; Hartman M; Partin M · Family medicine and community health · 2026
    Cohort study10,882 participantsEnergy forIodine
  2. Energy level and fatigue after surgery for thyroid cancer: A population-based study of patient-reported outcomes.
    Hughes DT; Reyes-Gastelum D; Kovatch KJ; Hamilton AS; Ward KC; Haymart MR · Surgery · 2020
    Cohort study2,584 participantsEnergy forIodine
  3. Health-Related Quality of Life in Differentiated Thyroid Cancer Survivors: A Cross-Sectional Study From Turkey.
    Gültekin A; Kahraman MY; Şengöz T; Şimşek FS · Head & neck · 2026
    Cross-sectional study202 participantsEnergy forIodine
  4. Iodine Supplementation Decreases Hypercholesterolemia in Iodine-Deficient, Overweight Women: A Randomized Controlled Trial.
    Herter-Aeberli I; Cherkaoui M; El Ansari N; Rohner R; Stinca S; Chabaa L; von Eckardstein A; Aboussad A; Zimmermann MB · The Journal of nutrition · 2015
    Randomized trial163 participantsMetabolism Boost forIodine
  5. Effect of oral iodized oil on thyroid size and thyroid hormone metabolism in children with concurrent selenium and iodine deficiency.
    Zimmermann MB; Adou P; Torresani T; Zeder C; Hurrell RF · European journal of clinical nutrition · 2000
    Single-arm trial51 participantsMetabolism Boost forIodine
  6. Serum Iodine Concentration as a Biomarker for Individual Iodine Nutrition and Thyroid Function in Pregnant Women: A Cross-Sectional Study in Hubei Province.
    Xu M; Dai X; Wang Z; Guo C; Zhang B; Guo H · Public health nutrition · 2026
    Cross-sectional study1,197 participantsMetabolism Boost forIodine
  7. Iron status influences the efficacy of iodine prophylaxis in goitrous children in Côte d'Ivoire.
    Zimmermann MB · International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition · 2002
    OtherMetabolism Boost forIodine
  8. Persistence of goiter despite oral iodine supplementation in goitrous children with iron deficiency anemia in Côte d'Ivoire.
    Zimmermann M; Adou P; Torresani T; Zeder C; Hurrell R · The American journal of clinical nutrition · 2000
    Non-randomized trial109 participantsMetabolism Boost forIodine