Hello, lybrate-user There are different fillers for breast most injections are hyaluronic acid based but are temporary and require large volume so not cost effective. Alternatively there is option of Breast Fat fill where your own body fat is extracted and injected into breast. Though this is more natural way the results are not predictable and there is some resorption of fat. You may require 2 or 3 sitting to get your desired volume. The most predictable results are achieved with Implants.