Mineral
Iodine (as Fermented Iodine Glycinate)
Also known as: Iodine glycinate, Chelated iodine, Iodide
Iodine is an essential mineral critical for thyroid hormone synthesis and metabolic regulation. Glycinate chelation may enhance absorption compared to traditional iodide forms.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Iodine (as Fermented Iodine Glycinate) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Pure Encapsulations Iodine (potassium iodide) | 92 A | $0.17 |
| 2 | Performance Lab Iodine | 92 A | $0.97 |
| 3 | NOW Foods Kelp | 91 A | $0.05 |
| 4 | Thorne Thyroid Health Complex | 90 A | $0.33 |
| 5 | Pure Encapsulations Iodine and Tyrosine | 90 A | $0.33 |
| 6 | Life Extension Thyroid Support Complex | 90 A | $0.90 |
| 7 | Natural Factors Liquid Kelp | 90 A | $0.01 |
| 8 | Thorne Advanced Nutrients | 88 A | $2.40 |
| 9 | Thorne Basic Nutrients 2/Day | 88 A | $0.60 |
| 10 | Thorne Basic Prenatal | 88 A | $1.23 |
| 11 | Thorne Men's Multi 50+ | 88 A | $1.87 |
| 12 | Thorne Emotion Balance Support | 87 A | $1.05 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Iodine (as Fermented Iodine Glycinate) should I take?
The typical range is 75-150 mcg daily. Ongoing supplementation recommended in iodine-depleted regions or for those at risk
When should I take Iodine (as Fermented Iodine Glycinate)?
Consistent daily timing recommended. Can be taken with or without food.
Which form of Iodine (as Fermented Iodine Glycinate) is best?
Iodine glycinate (chelated form).
Is Iodine (as Fermented Iodine Glycinate) safe?
Commonly reported: Generally well-tolerated at recommended doses.
Which Iodine (as Fermented Iodine Glycinate) supplement scores highest?
Pure Encapsulations Iodine (potassium iodide), at 92/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Thyroid hormone synthesis
- Metabolic regulation
- Cognitive development
- Reproductive health
How it works
- Incorporation into thyroid hormones (T3, T4)
- Cofactor for thyroid peroxidase
- Regulation of cellular metabolism
Dosage
- Typical range
- 75-150 mcg daily
- Timing
- Consistent daily timing recommended
- With food
- Can be taken with or without food
- Duration
- Ongoing supplementation recommended in iodine-depleted regions or for those at risk
- Special populations
- RDA: 150 mcg (adults), 220 mcg (pregnant), 290 mcg (lactating), 90 mcg (children 4-8). Higher doses may be needed in pregnancy.
Forms
- Iodine glycinate (chelated form)· 70/100
Safety
Common side effects
- Generally well-tolerated at recommended doses
Contraindications
- Hyperthyroidism or thyroiditis (unless medically supervised)
- Iodine allergy
Products containing Iodine (as Fermented Iodine Glycinate)
Top-scoring supplements in our catalog that list Iodine (as Fermented Iodine Glycinate) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Iodine deficiency is a well-established public health concern with strong evidence for supplementation. RCT evidence supports iodine's role in thyroid function and cognitive development.
Grade A: Multiple well-designed human trials support the main claims.
Related in Mineral
Check a full stack
Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.
Open the checkerWhere does Iodine (as Fermented Iodine Glycinate) fit in your stack?
Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.
Build my stack2 questions · free · no account needed to start
Also on iPhone — get the free app
Evidence-based supplement guides, no spam
We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.
Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.