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Chapter 23
© 2012 Rodrigues et al., licensee InTech. This is an open access chapter distributed under the terms of the
Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits
unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The Chitosan as Dietary Fiber:
An in vitro Comparative Study
of Interactions with Drug
and Nutritional Substances
Máira Regina Rodrigues, Alexandre de Souza e Silva and Fábio Vieira Lacerda
Additional information is available at the end of the chapter
http://dx.doi.org/10.5772/48311
1. Introduction
Obesity is considered a disease that has grown significantly in the last two decades
worldwide. The concern with this increase is justified because obesity develops and remains
due to different factors, causing several other diseases and sometimes, can lead to death.
Several strategies have been searched to control its progress usually through therapies and,
in critical cases, surgeries. Despite all efforts, statistical studies show that obesity is still
growing consequently generates the necessity of further studies on the subject (Dacome,
2005).
Epidemiological researches have studied the impact of overweight and obesity on the risk of
chronic disease, as coronary heart disease, type 2 diabetes mellitus, hypertension, stroke,
dyslipidemia, insulin-resistance, glucose intolerance, metabolic syndrome, and cancers of
the breast, endometrium, prostate and colon (Aslander-van Vliet et al., 2007). Health
consequences and compromised quality of life associated with obesity provide incentives to
abate the obesity epidemic. However, despite recognition of these effects, the epidemic of
obesity and overweight is not reversed (Johnson et al., 2007).
In general, treatments for obesity are based on regular exercise, nutritional reeducation,
pharmacological treatment, behavioral therapy and use of dietary fibers that promote the
reduction of fat absorption (Aslander-van Vliet et al., 2007). Much research has been
conducted on the dietary supplements that promote the reduction of body weight and fat
mass (Saper et al., 2004). These ingredients reportedly act as a fiber to increase satiety and
also to decrease the absorption of fat by binding to it (Kumirska et al., 2010).