Fig. 2From: The clinical significance of low dose biotin supplements (<300μg/day) in the treatment of patients with hypothyroidism: crucial or overestimated?Free thyroxin levels alterations. Free thyroxin levels (FT4, ng/dL) under biotin containing supplements (gray bar) and 10-15 days after withdrawal (white bar); * p<0.05. Data presented as means± SEMBack to article page