Eating less carbs automatically decreases the amount of insulin released to our tissues and we use existing fat stores for energy. (parsleyhealth.com)
If you are active enough, your body will start burning existing fat reserves, including the ones in your chest. (pseudogynecomastia.org)
Following a low fat diet will also make a difference since your body will start burning existing fat reserves, including the breast tissue. (pseudogynecomastia.org)