There are also some studies showing that caffeine can cause modest weight loss in humans.
One study in 30 overweight and obese men showed that forskolin reduced body fat and increased muscle mass, while having no effect on body weight. Another study in 23 overweight women found no effects.
Garcinia Cambogia Extract contains an ingredient called hydroxycitric acid (HCA), which has been used to aid weight loss. The of HCA is available in powdered form or pill form.
One study showed that it caused 21 lbs (9.5 kg) of weight loss over a 3 month period
It is claimed to make it harder for fat cells to multiply, decrease the amount of fat that they pick up from the bloodstream, and help them burn stored fat.
This weight loss pill works by inhibiting the breakdown of fat in the gut, making you take in fewer calories from fat.
In isolated fat cells from rats, raspberry ketones increase breakdown of fat and increase levels of a hormone called adiponectin, believed to be related to weight loss