Top 5 — Ranked by Evidence
Very Strong
Iodine
Thyroid hormone production
150 mcg/day (adults RDA); 220–290 mcg/day (pregnancy/lactation); upper limit 1,1
Strong
Ashwagandha
Testosterone and Muscle
300–600 mg/day standardized extract (withanolides ≥2.5–5%)
Strong
Black Seed Oil / Thymoquinone (ThymoQuin®)
Immune system modulation and respiratory health
450–2,000 mg/day black seed oil; ThymoQuin® clinical doses: 450–900 mg/day; most
Strong
Selenium
Antioxidant defense
55 mcg/day (RDA); therapeutic studies: 100–200 mcg/day; upper limit 400 mcg/day
Moderate
L-Tyrosine
Cognitive performance under stress and sleep deprivation
500–2,000 mg/day; cognitive/stress: 100–150 mg/kg before demanding tasks (milita
All Thyroid Health Ingredients (6)
Very Strong
Iodine
Thyroid hormone production
150 mcg/day (adults RDA); 220–290 mcg/day (pregnancy/lactation); upper limit 1,1
Strong
Ashwagandha
Testosterone and Muscle
300–600 mg/day standardized extract (withanolides ≥2.5–5%)
Strong
Black Seed Oil / Thymoquinone (ThymoQuin®)
Immune system modulation and respiratory health
450–2,000 mg/day black seed oil; ThymoQuin® clinical doses: 450–900 mg/day; most
Strong
Selenium
Antioxidant defense
55 mcg/day (RDA); therapeutic studies: 100–200 mcg/day; upper limit 400 mcg/day
Moderate
L-Tyrosine
Cognitive performance under stress and sleep deprivation
500–2,000 mg/day; cognitive/stress: 100–150 mg/kg before demanding tasks (milita
Limited
Sea Moss (Irish Moss / Gracilaria)
Dense micronutrient and mineral profile
1–4g/day dried sea moss powder or equivalent gel; no established clinical dose;