In some patients, the breast tissue will be fat and thus can be ‘lost’ with general weight loss. It depends on whether you have developed glandular tissue or not. If glandular tissue exists, you can’t just exercise or diet the problem away. Glands are here to stay. If you are overweight, losing weight may reduce the amount of fat present. Losing weight can undoubtedly decrease the visual impact of a fatty chest, but having an assessment to see whether you have glandular tissue is necessary.