Using lab-grown fat tissue (from stem cells, or other means) for BBL surgery. What is the current state of this approach?

Not currently happening. As always, be sure to research who does your procedure to increase your chances of having a good outcome.

Dear SarinaNyan,
at the moment, you can use only your fat tissue. 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

As of now, BBL's are typically performed from harvesting your own fat cells from another part of the body via liposuction. Given the typical larger amounts of fat needed for injecting, I do not believe that there is any way to culture/grow this degree and amount of fat cells needed for a noticeable result. Dr. W