Excess Alcohol
Alcohol has a lot of calories, so excess consumption can cause fat tissue to build up in your breast tissue, causing gynecomastia. This is one of the many disadvantages of excess alcohol intake.
However, there is another link between alcohol and gynecomastia which is your liver. If you have any disease replayed to alcohol such as cirrhosis, [6] it can disrupt the delicate balance of testosterone and estrogen in your body.
Illegal Drugs
Amongst the many ways, illegal drugs can put your life in danger. It can also cause Gynecomastia. It is important to avoid habitually using drugs bought on the street, examples of such drugs include methadone, heroine, amphetamines, and marijuana.