I have read some stuff online about how to naturally increase your breast size. However, I don't know whether to believe it, because it looks commercial, so they have a good reason to hype it.
So I'm wondering if there are books or scientific papers or anything that is based on science, that explains what determines fluctuations in breast size (for women who are not in puberty or pregnant).
I'm assuming the only way to increase breast size while retaining a calorie neutral diet, is through anything that naturally influences certain hormones (in whatever way).
Is this something about which there are scientific answers?