Taking fat burner pills may make the breasts smaller, if you chose the fat burner that works effectively. This is not because the effects of the fat burner pills go straight to the chest. This is because the breasts generally decrease in size after weight loss since they are, for the most part, made of fat, aside from the mammary glands the produce and secrete milk. However, it should be noted that the breasts do not “shrink” due to weight loss as some people claim. They just basically lose some of their mass with respect to the general fat loss in your body.
The same thing happens with weight gain. Depending on how much weight you gain, the body will store them on areas where extra body mass go. For some women (and even some men), the chest is often the first place where the fat gets stored. For others though, the lower body is the primary recipient of the excess body mass.
The truth is, the breasts and the face are the two areas of the body that are most vulnerable to down-sizing due to weight loss. The upper body is usually the first to show the effects of weight loss and then the lower body follows. But what area of the body gets smaller due to weight loss is largely dependent on the amount of fat on that area of the body, the type of workout performed on the area of the body, and the dictates of the genes.
Thus, aside from the fact that the anatomy of the breasts themselves makes them ideal for noticeable mass loss, it is but natural that they are the first areas of the body to receive the benefits of weight loss because they are large enough to show significant changes.