Question 1

Are contouring injections that destroy fat cells semi-permanent?

Accepted Answer

Injections that destroy fat cells themselves are known to produce relatively long-lasting results because the eliminated cells do not regenerate easily. However, the term "semi-permanent" is difficult to assert due to significant individual variation.

Ingredients like deoxycholic acid that break down the fat cell membrane prevent destroyed fat cells from reappearing, so if your weight remains stable, the refined contour tends to last longer. In fact, deoxycholic acid has been approved by the U.S. FDA for improving submental fat based on this fat cell destruction mechanism. However, since other remaining fat cells are still present, weight gain can cause these cells to enlarge, making lifestyle management important as well.

Question 2

Do contouring injections that only reduce cell size cause the fat to return?

Accepted Answer

Methods that only reduce the size of fat cells leave the cells themselves intact, so the volume can increase again with subsequent weight changes. This is because the number of cells is not reduced.

Fat cells can enlarge or shrink depending on the amount of fat they store. With injections that only reduce cell size, if you gain weight or neglect lifestyle management, the remaining cells can fill up again, diminishing the effect.

Mechanism of action	Fat cells	Duration tendency
Cell-destroying type	Cell count decreases	Relatively long with weight maintenance
Size-reducing type	Cells remain, volume only decreases	May return with weight gain

Question 3

Does weight gain make contouring injection results disappear?

Accepted Answer

If you gain weight, the remaining fat cells can enlarge again, which may blur the contour regardless of the procedure method. This is because fat cells change size based on the amount of fat they store.

Even with cell-destroying types, untreated fat cells in other areas remain, so overall weight gain can cause fat to reaccumulate in the face. Size-reducing types are more affected by this. In other words, without weight management, maintaining results from any injection becomes difficult.

Therefore, consistent weight management is important to prolong the effects of the procedure. The procedure is one way to improve contours, and maintenance is also influenced by subsequent lifestyle habits.

Question 4

How should I manage to maintain the effects of contouring injections?

Accepted Answer

To maintain the effects for a long time, it helps to keep your weight stable and, if needed, also care for skin elasticity. Weight changes directly affect the procedure results, so avoiding rapid fluctuations is important. If you are concerned about elasticity due to age or skin condition, combining skin tightening treatments such as radiofrequency or HIFU Lifting can help maintain a more natural change. Since post-procedure maintenance methods vary depending on individual fat volume, skin elasticity, and lifestyle habits, it is advisable to discuss management plans together when planning the procedure.

Question 5

Do contouring injections also differ in duration depending on the product?

Accepted Answer

Yes, the expected duration can differ depending on the ingredients and method used. This is because the principles behind how effects are maintained differ between methods that reduce fat cells and those that control fat cell size. Generally, methods that reduce fat cells themselves tend to last relatively longer, while methods that only adjust size may be more affected by weight changes. However, the duration varies greatly by individual, depending not only on the product but also on fat volume, skin condition, and lifestyle habits. Therefore, rather than focusing on a specific number of months, it is more reasonable to choose based on which method is suitable for your facial condition. We recommend that product selection and maintenance plans be customized through a consultation with a specialist.