Garcinia cambogia extract
Garcinia cambogia is a tropical fruit native to India and Southeast Asia, and the skin of the fruit, which contains hydroxycitirc acid, is marketed a weight loss supplements.
Animal studies have shown it can inhibit a fat producing enzyme in the body and increasing levels of serotonin, potentially helping to reduce cravings.
Another study involving 130 people compared garcinia against a dummy pill, and there was no difference in weight or body fat percentage between groups.
A 2011 review looked at 12 studies on garcinia cambogia found, on average, it caused weight loss of about two pounds over several weeks.
Glucomannan
Glucomannan is a dietary fibre made from the root of the konjac plant.