If there is not enough fat, it can be filled by applying materials such as hyaluronic acid or collagen. However, in general, the fat used for filling should be sufficient. If the patient is thin and the amount of fat to be filled is large, liposuction of multiple areas can be used to obtain fat. Generally, 100mL of fat can be obtained from the waist, abdomen, inner thighs, etc. 100mL of fat is sufficient for most of the facial fillers, but if it is used for breast fillers or buttock fillers, the amount of fat should not be sufficient. Breast fillers can be improved by breast implants for breast augmentation and buttocks can be improved by applying implants. To summarize, the fat obtained for facial fillers is usually sufficient.