If you want to put fat on your breasts, you can either gain weight all over your body OR lead a healthy lifestyle that will promote the breast tissue growth. If you only gain weight, then you will gain fat everywhere in your body, and your boobs will also get boobs as you lose weight.
I reached to the conclusion that there are 3 Fundamental Factors for Natural Breast Enhancement my blogand everything about it is related to having how good lifestyle.
Eat These 7 Foods For Bigger Breasts
You can not just change your daily gain for a week or two for your breasts to grow. It is a lifetime commitment if you want to grow AND keep the breasts you grew.
Through this, my nude pics of oprah that were always at AA-cup grew to fat comfortable C-cup at present, and they are still growing slowly but steadily.
You are young and healthy. Estrogen injections in the breasts sounds ridiculous for the purpose and potentially dangerous. I'm not a doctor.
See a real one, not a quack before you start messing with things like that. Taking fat off the body reduces the stomach, breasts, rear, legs, hips, all the curves.