Engineered particles of purified sand could be the next anti-obesity therapy as new research from the University of South Australia shows that porous silica can prevent fats and carbohydrates from being adsorbed in the body. The purified sand we speak of or also known as porous silica has received increasing attention for its anti-obesity potential, with human trials showing it is a safe therapy. However, exactly how it works has eluded researchers -- until now. (Courtesy sciencedaily.com)