Gynecomastia is the benign enlargement of breast tissue in men. Androgens and estrogens play a pivotal role in its development. But what about prolactin and progesterone, are they also involved? …

Aromatase inhibitors can lower estrogen in the body. They do so by inhibiting the enzyme aromatase. But how effective are they at lowering estrogen in men? And is there a difference in efficacy when administering exogeneous testosterone? …

For this research pick I’ll be addressing a recent paper by Pasiakos and colleagues. In this study they evaluated the effect of 200 mg testosterone enanthate weekly for a period of 4 weeks during a diet- and exercise-induced energy deficit of 55%. …