Chitosan

Chitosan is derived from the shells of shrimp and other crustaceans. As a compound, it is positively charged, and thus readily binds to negatively charged surfaces, like the kind belonging to fat molecules, among others. This makes it especially useful in clotting blood, and for this reason it has gained approval in the U.S. for use in bandages. However, prior to this, it was mainly used for water purification, since it would bind to and immediately absorb any toxins, including industrial greases and oils.

According to chitosan’s proponents, it can help dieters to lose weight without eating less by binding to fat so it can then be eliminated from the system rather than absorbed into the body. Some scientific research suggests that unmodified chitosan could eliminate a maximum of about 30 calories from the body per dose. For this reason, most supplements contain a modified or “high density” version that may be capable of absorbing considerably more. However, this ability can have its drawbacks, as some scientists believe that important vitamins and minerals may be blocked from the body along with fat.

Initially, chitosan sounds like a dream for those who want to lose weight but, for whatever reason, avoid stimulant-based approaches. It does not affect the nervous system, and will therefore not raise blood pressure or the heart rate. In spite of this appeal, some critics warn that there is little proof that chitosan will meet expectations. Initial studies did show that it had some fat-burning abilities, but this research was performed on animals, and therefore it cannot be known for certain whether of not chitosan will have a comparable effect on humans.

In spite of the uncertainty surrounding its abilities as a fat-blocker, studies have shown that chitosan may help to lower “bad” cholesterol and increase “good” cholesterol. However, some experts still limiting consumption so as not to completely block important fat-soluble vitamins.

• Does not stimulate the nervous system
• May help maintain healthy cholesterol levels
• Generally inexpensive

• Not suitable for those with seafood allergies
• May block the absorption of important vitamins and minerals
• It seems this product has not been well received by many consumers, as a number of them are voicing their concerns on consumer blogs and forums. Interested consumers can click here to read more about these issues in this Chitosan blog.
• Initial studies investigating fat-binding were performed on animals, not humans
• May not be suitable for daily use

As chitosan becomes a larger presence on the supplement market, dieters and scientists alike are becoming increasingly curious about whether or not it really is a viable tool for weight loss. It may have a positive effect on cholesterol levels, but its potential to block valuable vitamins and minerals may deter some consumers. Although initial studies showed impressive results, some argue that they provide only a part of the necessary data. Ultimately, more clinical trials are necessary to confirm chitosan’s fat-binding abilities.