Regardless of what the reports have discovered or suggested, it is paramount to look at the chitosan warnings. There is a possibility in theory that it could block the absorption of the fat-soluble vitamins, such as Vitamins A, D, E and K. Also, chitosan may block the absorption of the essential fatty acids, like omega 3 and 6. You must know the quantity and proper time of taking chitosan because if you will not follow the instruction written by doctor then you may have problems like itching, headache etc. When you are going to buy discount chitosan you must know the possible side effects of this medicine. Chitosan is made of crustaceans shell and some people have allergy problem because this shellfish. The system of how chitosan affecting blood lipids look forward to exposition. On the other hand, the system is almost certainly intermediated by the chitosan activities on micelle construction in the gut. It is actually the lipid carrier and as per a few experts, the varied micelles in the gastrointestinal area enclose free fatty acids, cholesterol and other elements. Numerous claims have suggested that chitosan as one of the most effective fat burners. In fact, it makes big promises of absorbing fat and preventing it from getting into your body, considering it as the definitive fat blocker. But, is it really a fat blocker? Before considering any of the studies conducted on chitosan, it is best to know first that whether chitosan is safe or effective as diet aid remains controversial even up to this day. Critics are continuously trying to keep people away of using high amount of chitosan based medicines. They do not bother any of the claims brought to light by manufacturers of these medicines. Reason behind this approach of critics is the non-availability of medical evidences supporting that there are no dangers of chitosan. Chitin is polymeric carbohydrate generally found in the outer skeletons of crustaceans and shellfish. Previously, people mostly make use of Chitosan in processes such as water detoxification. Although, the existence of Chitosan is quite old yet its latest form has just been prepared in recent times. Another significant the discovery that Chitosan is a natural compound with similar chemical properties as that of cellulose.