Evaluation of two over-the-counter natural thyroid hormone preparations in human volunteers.

OBJECTIVE To determine the pharmacologic activity of over-the-counter (OTC) thyroid preparations. DESIGN In vitro analysis and a prospective, crossover study in vivo. SETTING Tertiary care center. PARTICIPANTS Two healthy adult volunteers. INTERVENTION Three OTC preparations (Thyrotrophin PMG [bovine thyroid PMG extract], Thyro Forte [thyroid… CONTINUE READING