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Potassium Plus Iodine

NOW
4.8
★ ★ ★ ★ ★
(8178 ratings)
Iodine 225 mcg
Sodium 5 mg
Potassium 99 mg
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Score75
A strong iodine supplement with clear dosing and excellent practical value. Treat the potassium as a minor contribution, and use extra caution when thyroid disease or thyroid medication is involved.
How scoring works
Quantity:180 Tablet(s) • (180 servings)
Goals:
Metabolism Boost
Energy

Score 75

A strong iodine supplement with clear dosing and excellent practical value. Treat the potassium as a minor contribution, and use extra caution when thyroid disease or thyroid medication is involved.
How scoring works
$9.90($0.05 per serving)
Pure Formulas
$ 10.11
Daily Vita
$ 9.90
Amazon
$ 9.90
Vitacost
$ 10.97
iHerb
$ 10.40
Walmart
$ 12.99
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Analysis

The tablet's main strength is 225 mcg of iodine from stable potassium iodide. Iodine supports normal thyroid hormone production, so its energy and metabolism relevance depends largely on whether intake is inadequate.

The listed potassium amount is modest, and potassium iodide is not an efficient way to cover broader potassium needs. Five milligrams of sodium also has no practical role in exercise hydration.

One tablet and a long supply make the product easy and economical to use. People with thyroid conditions or thyroid treatment need more individualized guidance because added iodine can alter thyroid control.

Who is it for
  • Adults with low dietary iodine intake
  • People seeking a simple potassium iodide tablet
  • Users who do not need meaningful potassium replacement
Best for
  • Iodine supplementation
  • Supporting normal thyroid nutrition when intake is low
  • Low-cost daily use

Pros

  • Uses stable, readily absorbed potassium iodide
  • Provides a clearly stated 225 mcg iodine amount
  • One-tablet serving with a long supply

Cons

  • Potassium contribution is modest
  • Not suitable as an electrolyte product
  • Added alginate does not strengthen metabolism support

Warnings

  • People with autoimmune thyroid disease, thyroid nodules, or thyroid-hormone treatment should have the 225 mcg iodine intake reviewed by a qualified clinician.

Nutrient quality

70 High impact

A useful iodine form and dose are the clearest strengths. Minimal potassium and a sizable alginate addition weaken the intended nutrient contribution.

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Ingredient transparency

76 High impact

The main nutrient forms and amounts are mostly identifiable. Repeated potassium totals and missing non-active ingredients leave avoidable uncertainty.

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Customer satisfaction

72 High impact

The supplied average rating is very strong. No specific review comments were supplied, so repeated negative experiences cannot be assessed.

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Value for money

83 Highest impact

The iodine component delivers strong value at a low serving cost. Minimal potassium and low-value alginate keep the formula from leading on usefulness.

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Goals

Metabolism Boost
Impact
High effect
B Goal FitA Strength of SupportD+ CoverageB Formula Quality

Iodine directly supports thyroid-hormone production and can restore normal metabolism when intake is low. Extra iodine does not reliably accelerate metabolism when thyroid function is already normal.

Potassium iodide is stable, readily absorbed, and supplied at a well-chosen amount. Potassium and alginate do not add meaningful metabolism support but remain clearly disclosed.

Study evidence
Iodine Mixed 17 studies
Energy
Impact
High effect
B- Goal FitA- Strength of SupportD+ CoverageB+ Formula Quality
Iodine · 225 mcgPotassium · 99 mg

Potassium iodide supplies a well-absorbed iodine amount that can support thyroid hormone production and normal metabolic rate. The effect on energy is most relevant when iodine intake is inadequate rather than as an immediate boost.

The added potassium amount is too small to provide broad electrolyte or energy support. People with autoimmune thyroid disease, thyroid nodules, or thyroid-hormone treatment should have iodine intake reviewed because extra iodine can disrupt thyroid control.

Study evidence
Iodine Adverse 3 studies
Potassium Supportive 2 studies

Ingredients

IngredientAmount per serving
Iodine (Potassium Iodide)
225 mcg
Sodium (Sodium Alginate)
5 mg
Potassium (Potassium Chloride, Potassium Iodide)
99 mg
Sodium Alginate
100 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Potassium iodide supplies a stable, readily absorbed iodine form at a well-chosen 225 mcg dose. The label clearly identifies both the source and active iodine amount, while one tablet keeps use simple. Its very low serving cost provides strong iodine-specific value despite the additional potassium ingredients.

C- Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyA+ Value

The tiny sodium dose is poorly suited to athletic sweat replacement despite excellent cost efficiency. Sodium alginate is disclosed, but it is not a preferred natural salt or standard citrate source. Potassium and iodine broaden the mineral profile, though the formula lacks bicarbonate or a trace-mineral complex.

F Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyD+ Value

Potassium Plus Iodine uses potassium iodide, which is a less useful potassium form for general mineral support. The standard tablet dose offers only a modest contribution to daily intake. Its low serving cost partly offsets the limited potency.

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Sources

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

  1. Iodine deficiency and real-life supplementation ineffectiveness in Polish pregnant women and its impact on thyroid metabolism.
    Filipowicz D; Szczepanek-Parulska E; Mikulska-Sauermann AA; Karaźniewicz-Łada M; Główka FK; Szymanowski K; Ołtarzewski M; Schomburg L; Ruchała M · Frontiers in endocrinology · 2023
    Cross-sectional study91 participantsMetabolism Boost forIodine
  2. U-Shaped Associations Between Urinary Iodine Concentration and the Prevalence of Metabolic Disorders: A Cross-Sectional Study.
    Jin M; Zhang Z; Li Y; Teng D; Shi X; Ba J; Chen B; Du J; He L; Lai X; Teng X; Li Y; Chi H; Liao E; Liu C; Liu L; Qin G; Qin Y; Quan H; Shi B; Sun H; Tang X; Tong N; Wang G; Zhang JA; Wang Y; Xue Y; Yan L; Yang J; Yang L; Yao Y; Ye Z; Zhang Q; Zhang L; Zhu J; Zhu M; Ning G; Mu Y; Zhao J; Teng W; Shan Z · Thyroid : official journal of the American Thyroid Association · 2021
    Cross-sectional study51,795 participantsMetabolism Boost forIodine
  3. The relationship between excessive iodine during pregnancy and adverse pregnancy complications.
    Li S; Zha H; Cui Y; Sun L; Yu L; Yuan Q · Endocrine · 2025
    Cohort study595 participantsMetabolism Boost 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. 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
  6. 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
  7. 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
  8. [Efficacy of potassium N-acetylaminosuccinate (Cogitum) in the treatment of asthenic syndrome: results of double-blind placebo-controlled trial].
    Esin RG; Khayrullin IK; Esin OR; Fatykhova AF; Gismatullina EI; Isaeva YN · Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova · 2023
    Randomized trial37 participantsEnergy forPotassium
  9. Human resting energy expenditure in relation to dietary potassium.
    Dériaz O; Thériault G; Lavallée N; Fournier G; Nadeau A; Bouchard C · The American journal of clinical nutrition · 1991
    Randomized trial8 participantsEnergy forPotassium
  10. 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
  11. 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
  12. 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
  13. 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