Brown fat cells are where the the fats transported from the fat store in the human body (white fat cells) are burned. They are few and far between in the human body shortly after birth. Brown fat has a close relationship to muscles.
In this experiment, scientists succeeded to increase brown fat cells by introducing 2 specific proteins into the body of rats, and found that the rats become leaner.
Could one day we transplant brown fat cells into an obese person's abdomen to make him lose weight efficiently?
Read the details...
Could We Lose Weight by Injecting Fat into Our Bellies?: Scientific American
Source : Scientific American