The reason is your medicine may be causing such symptoms which may mean that you are allergic to chitosan-based products. So perhaps the best that you can do to protect yourself and your health is to tell your health care professional before taking any chitosan-based products about your current medication. Manufacturers of Chitosan Plus claimed that it has absorption capacity of five times more than its own weight for fat and cholesterol in human digestive system. They also claim that Chitosan particles gain positive charges on them during the process of purification. Consequently, these particles become able to attract fat molecules having negative charges on them. This chemical composition shows that Chitosan can be produced through the deacetylation of chitin on commercial basis. Chitin is the basic structural element present in the outer skeletons of crustaceans and this has been found out by resources of Chitosan chemistry. Generally, NMR spectroscopy is used to check out the percentage of deacetylation in artificially prepared Chitosan. First of all you should decide that either you will use chitosan based product or other types of supplements for losing weight. You can easily get chitosan based product from nutrition shops and pharmacies and some offer you discount prices. Online can offer some great discounts with a little effort. Numerous studies have reported chitosan really does work for weight loss, while others have reported that it doesn't. 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. It is suggested by diet and health experts to use Chitosan containing products after consulting a health care specialist. It should not also be brought into play by pregnant women. It is also worth noting that Natrol Chitosan should not be used before any exercise or beginning of the weight loss program.