The number of fat cells in the human body is constant and does not change over time. When we gain or lose weight, the size of these cells adjusts, but new cells do not form. After liposuction, the treated areas have significantly fewer fat cells, so weight gain in these regions is minimal. 

However, areas where fat has been transplanted, such as the breasts or buttocks, may increase in volume, with weight enhancing the results.

Maintaining a balanced diet and avoiding sudden weight fluctuations are essential to preserving the results of liposuction and lipofilling.