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Iodine 325 mcg

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(391 ratings)
Iodine 325 mcg
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Score79
Clear iodine yield and good value help, but kelp variability and an above-maintenance dose warrant caution.
How scoring works
Quantity:240 Tablet(s) • (240 servings)
Goals:
Energy

Score 79

Clear iodine yield and good value help, but kelp variability and an above-maintenance dose warrant caution.
How scoring works
$11.95($0.04 per serving)
iHerb
$ 11.95
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Analysis

The tablet provides 325 mcg of iodine from kelp in a simple single-active format. The disclosed elemental yield helps users calculate intake more accurately than a kelp-weight-only label.

Natural kelp can vary in iodine content and may contain other marine compounds, while the supplied data gives no standardization or purity details. The amount also exceeds ordinary maintenance needs.

Adults who specifically prefer kelp may accept those limits for a defined purpose. Potassium iodide at a lower amount is easier to manage for predictable routine supplementation.

Who is it for
  • Adults who prefer kelp-derived iodine
  • People seeking a higher-than-maintenance amount
  • Users wanting a long-serving tablet supply
Best for
  • Kelp-based iodine intake
  • Clearly quantified marine-source iodine
  • Focused supplementation

Pros

  • States elemental iodine yield
  • Simple single-ingredient tablet
  • Efficient serving value

Cons

  • Kelp standardization is not described
  • Purity details are absent
  • Dose exceeds basic maintenance needs

Warnings

  • The 325 mcg amount can add up quickly with seaweed foods or other iodine supplements and may alter thyroid function.
  • People with autoimmune thyroid disease, nodules, or thyroid medication use should avoid unsupervised extra iodine.
  • Kelp source and contaminant screening are not provided in the supplied data, which matters for users specifically concerned about marine-source purity.

Nutrient quality

75 High impact

Kelp supplies iodine in a whole-food source, but harvest region and purity details are missing. The iodine amount is above routine maintenance needs while remaining below the adult upper limit, while stacking this amount may disrupt thyroid function in susceptible users.

Ingredient transparency

77 High impact

The iodine yield and kelp source are clear, though purity and origin are not supplied. 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.

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Goals

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

Iodine supports thyroid hormone production, which helps regulate metabolic rate and energy expenditure. Benefits are most likely when iodine intake is inadequate rather than as a direct stimulant for otherwise sufficient users.

The 325 mcg amount is clearly stated but is higher than basic maintenance needs, and kelp can vary more than isolated iodide sources. People with thyroid disease or those already using iodine should avoid stacking this dose because excess iodine can disrupt thyroid function and energy levels.

Study evidence
Iodine Adverse 3 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

The kelp source provides a clearly stated iodine amount, but no organic status or clean-water origin is given. The 325 mcg dose is above the preferred daily-maintenance range while remaining below the adult upper limit. A single-tablet serving and very low cost make it convenient, though people seeking basic maintenance may prefer a lower dose.

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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