Zinc
Zinc is necessary mineral required by the body for the proper synthesis of cells, boosting metabolism and efficient replication of DNA. Any decrease of zinc level in foods can cause gynecomastia. Zinc promotes the production of testosterone in males, which is why it is also termed as “manly mineral”. Hence, it reduces the effects of gynecomastia. Sufficient level of zinc helps the cells in the testes which increases the production of testosterone and quality of sperms. Chicken, flax seeds, oysters and crabs are rich in zinc.