Diet pills that work contain active ingredients intended to burn fat, decrease appetite and reduce fat absorption. Fast weight loss pills typically include caffeine, green tea extracts and medically proven weight loss supplements like pyruvate and glucomannan. Some of the best diet pills right now also contain garcinia cambogia.
Caffeine and green tea extract help increase metabolism, pyruvate may help decrease body fat and glucomannan is a natural dietary fiber that helps feed the good bacteria in your intestines. Garcinia cambogia contains hydroxycitric acid (HCA). Studies show HCA inhibits fat-producing enzymes in some animals, but evidence that garcinia cambogia is effective for weight loss remains inconclusive.
Side effects of prescription and over-the-counter diet pills can be severe, especially if you’re sensitive to caffeine. The most common side effects of diet pills include digestive problems, diarrhea, blurred vision, headache, nausea, insomnia, anxiety and irritability.