Is there a certain limit on the amount of fat tat can be transferred in a bbl?

Thanks for your question. While you can liposuction several areas at once there is a limit to how much fat can be removed safely. Risks from liposuction increase significantly when over 5 liters of fat are suctioned out. We usually stay below this limit for patient safety. We’ve found that we’re able to achieve dramatic improvements for our patients with 2 to 4 liters of liposuction, depending on their needs. Buttock augmentation with fat grafting is one of our most popular procedures in Colombia, and from experience we can tell you that some patients do very well with 300 cc of fat per side while others can need 800 cc or more.  

For safety reasons, 5000 cc is the generally accepted upper limit for liposuction in an outpatient setting, with the transfer being less than that.  Depending upon how much the buttock will stretch, you may be able to inject 2000 cc per buttock.
Kenneth Hughes, MD, ABPS Board Certified Plastic Surgeon
Los Angeles, CA 

Dear lotus.n0ire,
in case of fat transfer, it is important to avoid overfilling the space with fat cells in order to avoid increased pressure in that area and consequently fat necrosis. Fat viability depends a lot of surgeon technique. The fat has to be placed back into the buttocks as soon as possible so that it has a greater chance of survival. It has to be placed carefully so that not too much fat is placed in only one area. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery