There are two ways to look at it. If you have too much fat (like 50 pounds over weight), you might not be a good candidate because of swing in weight that could change my result. Also, if you are bone thin, I may not have enough fat to do the procedure. However, in about 85% of individuals who are beginning to age, they have enough fat (I don't need a lot) to do the work. just about 20 plus cc for someone in their 30s. and about 35 to 40 for someone in their late 40s as a comparison. i have written two books on fat transfer and it is my specialty. here is a video on understanding fat grafting. also there is a link to my fat grafting page with links to my before and after results along with a ton of videos on the subject. best, sam lam