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Potassium Iodide Iodine 150 mcg

NaturesPlus
4.9
★ ★ ★ ★ ★
(6044 ratings)
Iodine 150 mcg
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Score87
A well-defined iodine form at a maintenance amount makes this a practical basic option when dietary intake is low.
How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
Energy

Score 87

A well-defined iodine form at a maintenance amount makes this a practical basic option when dietary intake is low.
How scoring works
$11.86($0.11 per serving)
Pure Formulas
$ 11.86
iHerb
$ 11.86
Vitacost
$ 12.13
iHerb
$ 11.86
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Analysis

The 150 mcg serving matches a common daily maintenance amount, and potassium iodide provides predictable chemistry. A single-ingredient tablet also makes total iodine intake easy to calculate.

The formula is intentionally narrow and does not support other pathways related to energy. People who already use iodized salt or eat iodine-rich foods may not need additional intake.

Adults with low dietary iodine who want a conservative tablet are the clearest fit. It is a nutritional maintenance product rather than an immediate energy aid.

Who is it for
  • Adults with low dietary iodine intake
  • People who prefer potassium iodide
  • Users wanting a maintenance-dose tablet
Best for
  • Routine iodine maintenance
  • Clearly quantified single-mineral use
  • Simple daily supplementation

Pros

  • Uses stable potassium iodide
  • Provides a maintenance amount
  • Clearly states elemental iodine

Cons

  • Offers no other nutrients
  • Not useful when iodine intake is already adequate
  • Does not provide an immediate energy effect

Warnings

  • People with Hashimoto’s disease, Graves’ disease, thyroid nodules, or other thyroid disorders should individualize iodine intake.
  • Levothyroxine, antithyroid medicines, and amiodarone can make unsupervised iodine changes inappropriate.
  • Combining the tablet with kelp or seaweed supplements may create unnecessary iodine excess.

Nutrient quality

94 Highest impact

Potassium iodide provides stable, water-soluble, and predictably absorbed iodine. The elemental amount matches routine daily maintenance needs, while the maintenance amount avoids obvious excess for most adults.

Ingredient transparency

82 Highest impact

The chemical form and elemental iodine amount are fully specified. Serving totals are apparent, but full directions and inactive ingredients are not supplied.

Customer satisfaction

73 High impact

The supplied average rating is exceptionally strong. The very large rating base makes the average unusually stable, while complaint and firsthand experience details are unavailable.

Value for money

97 Highest impact

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

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Goals

Energy
Energy
Impact
High effect
C- Goal FitB- Strength of SupportF CoverageA+ Formula Quality
Iodine · 150 mcg

Potassium iodide provides 150 mcg iodine in a stable and well-disclosed form. Iodine can support normal thyroid-related energy metabolism when intake is inadequate.

The product is not an acute energizer and will not predictably increase energy when iodine status is adequate. The single-ingredient design does not address mitochondrial, alertness, or stress-resilience pathways.

Study evidence
Iodine Adverse 3 studies

Ingredients

IngredientAmount per serving
Iodine (Potassium Iodide)
 150 mcg
Gluten Free Adults 18–50 No Allergies Vegetarian
Report overview
Iodine (Potassium Iodide) · 150 mcg OverallScore100
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Potassium iodide supplies a stable, highly bioavailable iodine form at an appropriate daily amount. The label clearly states elemental yield, and the single-tablet format provides practical delivery. A very low serving cost supports excellent value for routine iodine use.

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79 Performance

Ionic Iodine from Potassium Iodide 225 mcg

Trace Minerals Research
<p>The ingredient profile provides 225 mcg of iodine as potassium iodide; compared with the original, the 225 mcg iodine amount is higher than the original 150 mcg and the predictable potassium-iodide form is retained. Potassium iodide provides a stable, readily absorbed source at a practical routine amount, while the undisclosed trace-mineral mixture slightly reduces clarity.</p>
88 Performance

Kelp

NOW
<p>The ingredient profile provides 150 mcg of iodine from organic kelp; compared with the original, the iodine amount stays close to the original at 150 mcg and the formula remains focused on iodine. Organic kelp supplies a standard maintenance amount with useful sourcing detail, though natural seaweed variation remains a limitation.</p>
79 Performance

Iodine 500 mcg

Solaray
<p>The ingredient profile provides 500 mcg of iodine as potassium iodide; compared with the original, the 500 mcg iodine amount is higher than the original 150 mcg and the predictable potassium-iodide form is retained. The amount is excessive for routine maintenance and may complicate thyroid disease or thyroid medication management.</p>
75 Budget

Potassium Plus Iodine

NOW
<p>The lower serving cost provides 225 mcg of iodine as potassium iodide plus 99 mg of potassium; compared with the original, the 225 mcg iodine amount is higher than the original 150 mcg and the predictable potassium-iodide form is retained. Potassium iodide provides a useful iodine dose, but the potassium amount is too small to serve as meaningful potassium supplementation.</p>
85 Budget

Kelp Thallus

Nature's Answer
<p>The lower serving cost provides 150 mcg of iodine from kelp; compared with the original, the iodine amount stays close to the original at 150 mcg and the formula remains focused on iodine. Kelp supplies a well-targeted maintenance iodine amount, but marine purity and natural source variability remain uncertain.</p>
87 Budget

Kelp

Swanson
<p>The lower serving cost provides 225 mcg of iodine from Atlantic kelp; compared with the original, the 225 mcg iodine amount is higher than the original 150 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.</p>
88 Value

Arctic-Kelp 225 mcg

Country Life
<p>The favorable balance of serving cost and formulation provides 225 mcg of iodine from Arctic kelp; compared with the original, the 225 mcg iodine amount is higher than the original 150 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.</p>
86 Value

Icelandic Kelp

NaturesPlus
<p>The favorable balance of serving cost and formulation provides 150 mcg of iodine from Icelandic kelp; compared with the original, the iodine amount stays close to the original at 150 mcg and the formula remains focused on iodine. The focused design offers excellent value for iodine support but does not provide broader energy ingredients.</p>
87 Value

North Atlantic Kelp

Solgar
<p>The favorable balance of serving cost and formulation provides 200 mcg of iodine from Atlantic kelp; compared with the original, the 200 mcg iodine amount is higher than the original 150 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.</p>
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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