One of the traits of a scientist is skepticism meaning scientist always possess a certain doubt about a common belief. Weight loss companies often bias their products as to (1) weight loss in a specified amount of time, (2) improvement of physical appearance as seen on advertisements, and (3) improvement of overall health by combating obesity. As a scientist, I use skepticism to evaluate their data by looking at the active ingredients of the product and doing a thorough research and critical appraisal on whether or not the active ingredients of the product works and whether or not the active ingredients are safe.