Tri-Iodine 25 mg

Tri-Iodine 25 mg

Terry Naturally4.7 (1,037 ratings)
Format:Capsule Quantity: 60 Capsule(s) · 60 servings
$38.36 $0.63 per serving
Daily VitaLowest$38.36Vitacost$39.96iHerb$39.96Amazon$39.96

About this product

The formula supplies 25,000 mcg from iodine of an unspecified form in a capsule. A straightforward single-ingredient presentation, but the extraordinarily high serving is far above the adult upper intake level.

Iodine supports normal thyroid-hormone production when intake is inadequate. A high dose does not provide broader energy, metabolism, or hair support and may instead destabilize thyroid control.

Routine self-directed use is therefore hard to justify. The format may be convenient, yet the exposure calls for a defined clinical reason and thyroid monitoring.

Who is it for
  • people whose specialist has specifically prescribed and monitors this exposure
  • people whose diet provides too little iodine
Best for
  • targeted iodine support
  • supporting normal thyroid-hormone production when iodine intake is low

Pros

  • Clearly states an iodine amount of 25,000 mcg
  • A straightforward single-ingredient presentation
  • Capsule keeps use straightforward

Cons

  • The extraordinarily high serving is far above the adult upper intake level
  • Poor fit for ordinary daily maintenance
  • Does not provide broader support for the listed goals

Warnings

  • The 25,000 mcg serving calls for direct medical oversight because it exceeds routine nutritional intake.
  • Do not combine this dose with kelp, multivitamins, or other iodine supplements.
  • People with autoimmune thyroid disease, thyroid nodules, or thyroid-medicine use are especially vulnerable to thyroid disruption from high iodine.

Product analysis

53 out of 100
The formula is clearly positioned for high-potency iodine, but the extraordinarily high serving is far above the adult upper intake level. It is not well suited to routine self-directed use.

AI assessment of the formula, label and price. How scoring works

Nutrient quality31

The formula supplies iodine without identifying its chemical form. The very high amount is poorly suited to routine use and may disrupt thyroid function without direct medical supervision.

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Ingredient transparency77

The iodine amount is stated clearly, but its chemical form is missing. Complete capsule ingredients and the supervision context for the high dose are not supplied.

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Customer satisfaction72

The supplied average rating is strong and backed by a large review pool. No review text is available to assess recurring complaints or firsthand tolerance and ease of use.

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Value for money30

The extreme dose and weak routine suitability do not justify the relative cost. The higher relative serving cost adds no value beside the extreme dose concern.

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Format
Capsule
Container
60 Capsule(s)
Per serving
$0.63
Also available
Tri-Iodine 3 mgIodine 3000 mcg • 90 Capsule(s) • 90 servings$23.16
Customer rating
4.7 · 1,037 ratings
Report analysis

Ingredients

IngredientAmount per servingScore
Iodine
25000 mcg 51
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Vegetarian
Report overview
Iodine · 25000 mcg OverallScore51
B- Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyD+ Value
The 25,000 mcg iodine serving greatly exceeds the daily upper limit, which is the main concern. Its clearly disclosed blend consists mostly of potassium and sodium iodide with a small molecular iodine share. Marine sourcing details are limited. The cost per serving is relatively high.
How this ingredient is rated

Active Ingredient Quality & Bioavailability73

The disclosed blend consists mostly of potassium iodide and sodium iodide, with a small molecular iodine share. Marine sourcing details remain limited.
Iodine Form & Bioavailability
The disclosed proportions show mainly potassium iodide and sodium iodide, alongside a small amount of molecular iodine.
Marine Source Purity & Sourcing
The marine source has no stated organic status or geographic sourcing marker in the available information.

Dose, Safety & Label Transparency28

The 25,000 mcg iodine amount is clearly stated, but it greatly exceeds the daily-support range and the daily upper limit.
Dosage Efficacy for Daily Support
At 25,000 mcg per serving, the iodine dose is far above the 150–300 mcg daily-support range.
Dosage Safety & Upper Limits
The serving exceeds the 1,100 mcg daily upper limit; excessive iodine can disrupt thyroid function.
Elemental Iodine Transparency
The stated amount is iodine itself, so the active dose is clear.

Value50

The cost per serving is relatively high.
Price Per Effective Serving
The cost per serving is relatively high.
View ingredientView products
Loading alternative details
88 Performance

Arctic-Kelp 225 mcg

Country Life

The ingredient profile provides 225 mcg of iodine from Arctic kelp; compared with the original, the 225 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.

87 Performance

Kelp

Swanson

The ingredient profile provides 225 mcg of iodine from Atlantic kelp; compared with the original, the 225 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.

87 Performance

North Atlantic Kelp

Solgar

The ingredient profile provides 200 mcg of iodine from Atlantic kelp; compared with the original, the 200 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The appropriate dose and very low serving cost create excellent practical value.

83 Budget

Organic Kelp

NOW

The lower serving cost provides 450 mcg of iodine from organic kelp; compared with the original, the 450 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. Organic kelp offers a useful purity signal and flexible liquid use, but the iodine amount is above basic maintenance needs.

81 Budget

Icelandic Kelp

Nature's Life

The lower serving cost provides 225 mcg of iodine from Icelandic kelp; compared with the original, the 225 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The iodine amount is above basic daily needs and can complicate thyroid disease or thyroid medication, so routine use should be deliberate.

81 Budget

Iodine+

Codeage

The lower serving cost provides 250 mcg of iodine as nascent iodine; compared with the original, the 250 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The above-maintenance amount offers no assured metabolic benefit when iodine status is adequate and can complicate thyroid management.

88 Value

Kelp

NOW

The favorable balance of serving cost and formulation provides 150 mcg of iodine from organic kelp; compared with the original, the 150 mcg iodine amount is far more conservative than the original 25,000 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.

86 Value

Icelandic Kelp

NaturesPlus

The favorable balance of serving cost and formulation provides 150 mcg of iodine from Icelandic kelp; compared with the original, the 150 mcg iodine amount is far more conservative than the original 25,000 mcg and the formula remains focused on iodine. The focused design offers excellent value for iodine support but does not provide broader energy ingredients.

85 Value

Kelp Thallus

Nature's Answer

The favorable balance of serving cost and formulation provides 150 mcg of iodine from kelp; compared with the original, the 150 mcg iodine amount is far more conservative than the original 25,000 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.

Report alternatives

Sources

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

  1. 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
  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. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. Urinary Iodine Concentration and Thyroid Hormone Metabolism in Pregnant Women and Neurodevelopment in Their Children: A Longitudinal Canadian Birth Cohort.
    Berghuis SA; Hall M; Krzeczkowski JE; Goodman CV; Chevrier J; Ayotte P; Lanphear B; Till C · Nutrients · 2025
    Cohort study1,501 participantsMetabolism Boost forIodine
  11. A study on the differences in urinary iodine and serum iodine in relation to children's iodine nutrition and lipids.
    Zhang Y; Xu L; Wang L; Gao H; Hao J; Dong L; Qiu L; Wang J; Yan S; Liu L · Lipids in health and disease · 2026
    Cross-sectional studyMetabolism Boost forIodine
  12. Serum Manganese, Cobalt, Copper, Zinc, Selenium, and Iodine Levels, and the Incidence of Type 2 Diabetes: A Nested Case-control Study.
    Ito A; Yamamoto S; Iwai-Shimada M; Kobayashi Y; Isobe T; Iwai K; Nakayama SF; Konishi M; Watanabe Y; Yamamoto S; Nakagawa T; Yamazaki S; Mizoue T · Biological trace element research · 2026
    Case-control study936 participantsMetabolism Boost forIodine
  13. 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