Best Supplements for Increased Serum Free Thyroxine Levels
Ranked by research evidence. Compare 11 supplements across 13 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Low evidence3 studies
Across 3 studies, 2 reported small beneficial effects of selenium on increasing serum free thyroxine (FT4) levels in clinical populations with thyroid disorders, while 1 found no significant effect in hemodialysis patients. The predominant effect size was small, and effects were typically observed at a dose of 200 μg per day over approximately 12 weeks. Evidence primarily comes from patients with Hashimoto thyroiditis or Graves-Basedow disease.
Dose: 200 μg per day
11 supplements
- LowSeleniumAcross 3 studies, 2 reported small beneficial effects of selenium on increasing serum free thyroxine (FT4) levels in clinical populations with thyroid disorders, while 1 found no significant effect in hemodialysis patients. The predominant effect size was small, and effects were typically observed at a dose of 200 μg per day over approximately 12 weeks. Evidence primarily comes from patients with Hashimoto thyroiditis or Graves-Basedow disease. · Dose: 200 μg per day2 beneficial1 neutral3 studies