Breast fat is mainly caused by the accumulation of excess fat in the chest. To lose it, we can start from the following aspects.

First, control diet, minimize fat intake, and ensure a large amount of protein. It is best to use meat products such as fish and chicken.

Second, do some exercises related to chest muscles, including supine birds and push-ups. The specific movements, weights and times can be viewed from some related websites or books.

Third, while doing the above-mentioned exercise, ensure that aerobic exercise for more than 30 minutes at least three times a week, such as aerobics, can effectively burn body fat.

I hope this helps.