Chitosan

Chitosan comes from chitin, which is found in crustacean shells, lobster, shrimp, and crabs. This polymer has a positive electrical charge. When taken orally, it theoretically binds to negatively charged fat molecules. This is supposed to prevent the absorption of fat by your intestines.

There are some studies on it that show about a 7 lb 4 oz weight loss. These studies were performed by the same people and there are some concerns about how the studies were conducted. Some higher quality studies have shown that this supplement does not help in weight loss. In studies on healthy people, there was no increased amount of fat found in their stools.

In short term studies, chitosan appears to be harmless. However, some side effects can occur. Certain vitamins need to be absorbed along with fat, and it may prevent them from being absorbed. There are theoretical concerns about interference with the blood's ability to form clots. It has also caused low blood sugar in animal experiments.

It is important you discuss any weight loss or exercise plan with your doctor. Only you and your physician can decide what is best for you. Some people have certain conditions that prevent them from doing all exercises, and goal body weights may be different for different people. You need to discuss all these things with your physician before starting any weight loss or exercise program.