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Causes of Gynecomastia
It’s important to note that gynecomastia is a medical term referring to excess breast gland tissue, not the appearance of “man boobs” caused by weight gain that can be reversed with lifestyle changes. True gynecomastia causes the appearance of breasts in males regardless of their overall weight or body composition, since true gynecomastia exists when the natural breast tissue (yes guys, we have this as well!) is genetically over-responsive to hormone levels and grows disproportionately as a result.
The most common cause of gynecomastia is hormone changes attributed to puberty, which often balance out in early adulthood. Hormonal fluctuations in late middle age may also lead to increased breast tissue in men. Additional Trusted Source Enlarged Male Breast Tissue (Gynecomastia) The Cleveland Clinic Go to Source causes of gynecomastia include: