According to the Memorial Sloan-Kettering Center, or MSKCC, chitosan may be used as a supplement to help lower cholesterol levels in the blood. The cholesterol type that chitosan targets is LDL, or low density lipoprotein. LDL is often called the "bad" kind of cholesterol as it accumulates in the body and can lead to heart disease. The MSKCC adds that no optimal dose or long-term efficacy has been established for using chitosan to lower cholesterol levels. Because Chitosan is a positively charged compound, it is able to attract and bind to fatty acids (which carry a negative charge). As such, chitosan can absorb up to 4-6 times its weight in fat (including cholesterol) and prevent that fat from being absorbed into the body. This means that for every gram of chitosan that you consume as a supplement, you'll prevent the absorption of about 4-6 grams of fat.