Top pick · DoseRank
Why this ranks #1 for thyroid function
#1
NaturesPlus, Icelandic Kelp, 300 Tablets (150 mg per Tablet)
NaturesPlus$0.03 / serving4.9 · 9,144Available now
Why this ranks here
- Evidence fitIodine leads the evidence here, backed by Kelp.
- Dose fit2 of 2 dosed ingredients land in the studied range. Iodine at 150 mcg lands inside the studied 150-1000 µg window.
- Price / serving$0.03 per serving — low price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
Trade-offs
Dose fit is the weak spot on this listPopularity trails the other picks here
The numbers
93
95
67
94
150 mcgIn rangeinside the studied 150-1000 µg window
150 mgIn rangeinside the studied 150-600 mg window