Everything DoseRank tracks on the iodine shelf — Potassium Iodide and Kelp. The category itself is never ranked: 85 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing iodine supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Thyroid-stimulating hormonePituitary hormone used to assess thyroid status.59 rankedStrong
Iodine statusBiochemical sufficiency of iodine.59 rankedStrong
Thyroid functionOverall function of the thyroid axis.59 rankedModerate-strong
Electrolyte balancePhysiologic balance of sodium, potassium, and related ions.15 rankedModerate-strong
Potassium statusBody potassium balance.19 rankedStrong
CortisolStress-related glucocorticoid hormone level.5 rankedStrong
Immune toleranceBalanced immune regulation without excessive reactivity.1 rankedLimited
Free thyroxine (Free T4)Circulating active thyroid hormone fraction.5 rankedLimited
Stress resilienceAbility to cope with or recover from stress.8 rankedModerate-strong
Aerobic capacity (VO2 max)Maximum oxygen utilization during exercise.6 rankedModerate-strong
StrokeCerebrovascular event causing neurologic injury.19 rankedModerate-strong
Perceived stressSubjective experience of stress or overload.7 rankedStrong
Range of motionExtent of achievable joint movement.1 rankedModerate-strong
Cognitive functionOverall thinking ability including memory, attention, and processing.40 rankedModerate-strong
Gingival inflammation or bleedingGum irritation, swelling, or bleeding.1 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best iodine supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 85 products against that goal's trials.