Chitosan extracts are a natural product derived from the shells of crustaceans. The extracts have a range of potential applications, including as a weight-loss supplement, an anti-inflammatory agent, and a cholesterol-lowering agent. Chitosan extracts are also being investigated for their potential use in treating cancer. The extracts contain compounds that can kill cancer cells and stop their growth. They also help to promote the death of cancer cells that have already been diagnosed.