Breast fat transfer - does the fat stay?

Fat transfer to the breasts can provide a natural increase in volume, and with proper technique, much of the transferred fat can permanently survive. Typically, about 60–80% of the fat remains long-term. Caffeine consumption does not cause fat loss in the breasts or affect fat graft survival. However, significant changes in weight or hormones can impact long-term results.
Erman AK, Dr. MD, Plastic Reconstructive & Aesthetic Surgeon

Dear Terrific798166,
you will probably lose some fat in the early postoperative period. However, once you are fully healed your breast fat will be the same as fat in the rest of your body. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Yes, fat transfer can be a relatively permanent procedure. When fat is successfully transferred and integrated into the recipient site, it generally stays there. However, some factors can influence the longevity of the results:

Recipient site: The quality and vascularity of the recipient site can affect how well the fat survives and thrives. Areas with good blood supply tend to have better long-term results.
Donor site: The quality and quantity of the fat harvested from the donor site can also impact the outcome.
Surgical technique: The surgeon's skill and technique in harvesting, processing, and injecting the fat can significantly influence the results.
Individual factors: Factors such as your age, overall health, and lifestyle can also play a role.
It's important to note that some fat absorption is normal after a fat transfer procedure. However, if you experience significant fat loss, it might be necessary to consider additional procedures.

To learn more about the potential longevity of your fat transfer results, consult with your plastic surgeon. They can provide a personalized assessment based on your individual circumstances.