Based on scientific evidence, this unique combination of homeopathic remedies, when coupled with vitamin B12 drops, controls appetite and increases metabolic rate, which is the amount of energy the body uses in a certain time period. When the metabolic rate increases, the amount of calories that the body burns for energy also increases. SLENDERIIZ Drops Slenderiix & Xceler8 are 100% safe and clinically proven to help you lose weight up to 3 times more than diet and exercise alone.