In actuality, clinically, any area where we have a buildup of subcutaneous fat can be tapped for fat grafting. Then why in the clinic, doctors often say to draw fat from your legs or under your buttocks, but not from your abdomen for lipofilling? Doctors will give you these recommendations because lipoproteinase activity is higher in these areas. It has been found in clinical studies that fat in every part of our body contains lipoproteinase, and the higher the activity of lipoproteinase, the more active the fat cells are, then the more resistant it is to hypoxia, and the easier it is to survive. This series of cause and effect relationship is not already dizzying? To put it simply: fat with high lipoproteinase activity is compared to a “Tibetan” living on a plateau. The fat with low lipoproteinase activity is equivalent to the “mainlanders” living on the plain. When you put a “mainlander” on the plateau, he may have plateau reaction, physical discomfort, or even serious complications, leading to death. For the “Tibetans”, when they go to the mainland, they have plenty of oxygen and will not experience discomfort. Therefore, we extracted fat cells with higher lipoproteinase activity and stronger resistance to hypoxia, for example, the fat in the thighs or under the buttocks. They can survive in the absence of tissue nutrient solution for a long time. Not only that, the fat under the thighs or buttocks has two other benefits: 1. Less fibrous lattice The fibrous lattice occupies the ineffective volume of the fat filler, and the excessive fibrous lattice is not something that will survive in the body, it will be metabolized. Once the fat filling is absorbed after the surgery, the shape may be less full, or it may not achieve the appearance we want, which will affect our final result. 2, the fat particles are more delicate Delicate fat particles, more suitable for superficial filling, like our face, tear trough, etc., it will not appear nodules or lumps. If you take fat from the abdomen or other parts of the body and use it for superficial filling, there may be some nodules, lumps or unevenness. This is because the fat particles in these areas are relatively large. Of course the fat in the waist and abdomen area is not of little use, it can be used for breast augmentation, after all, the amount of fat in the waist and abdomen is generally larger. Therefore, if a candidate wants to do fat filling, it is recommended that fat from the thighs and under the buttocks is preferred to get a good filling effect.