Hoodia is the herbal supplement which claims to reduce the hunger and contribute to losing weight. Only Gordonii species contains P57 molecule which is responsible for this. The British pharmaceutical company Phytopharm proved P57 plays the similar role to glucose and inspire the brain into belief the stomach is filled, so reducing curiosity in food.  The condensed appetite and cravings indicate less food is taken, resulting in weight loss and it happens without any exercise or even dietetic changes. A Hoodia supplement such as Unique Hoodia also suppresses thirst. This could make dehydration a concern, particularly during exercise and other physical activities.