Where Does it Come From. Simply Garcinia is naturally extracted from the Garcinia Cambogia fruit found in India and Southeast Asia for its high concentration of HCA (Hydroxycitric Acid). For centuries Garcinia Cambogia has been used in cooking and seasoning of the local foods there. Unlike other Garcinia supplements, Sed Garcinia contains no fillers, added chemicals or genetically modified ingredients.
The fruit is known in India as gambooge. It is apparently also an ingredient in some weight loss products as hydroxycitric acid. Oz promoted it and continues to assert that garcinia cambogia is an effective aid to weight loss. The claims for weight loss are nothing short of outlandish and there is real science that suggests the whole thing is a hoax. Studies that claim to have found weight loss were carried out on animals.
Studies involving humans are for the most part badly designed. A few quality studies have been carried out over the years, starting in 1998 with a double-blind, placebo-controlled trial of 135 adults over 12 weeks published in The Journal of the American Medical Association. They found no evidence that hydroxycitric acid, the active ingredient in weight loss products made from garcinia cambogia, produced significant weight loss. The American Journal of Clinical Nutrition in 2004 published a systematic review of meta-analyses and clinical trials on dietary supplements for weight loss by complementary medicine researchers at the Universities of Exeter and Plymouth.
None of the over-the-counter weight loss aids worked, including garcinia cambogia. Late in 2010 the peer-reviewed Journal of Obesity published a meta-analysis of studies testing the garcinia as a weight loss aid.
Of the 23 trials they identified, 12 were methodologically sound enough to include in their analysis. The analysis revealed that some statistically significant weight loss occurred, but the magnitude of the effect is small and the clinical relevance is uncertain.
All of these studies are so-called randomized controlled trials, which are the gold standard of scientific experiments in humans. The biggest of the studies included 135 overweight individuals, which were split into two groups (7): Treatment Hausfraen 1 gram of Garcinia Cambogia Extract, 3 times per day, taken 30 minutes before meals. Placebo group: The other Hausfraue took dummy pills (placebo). Both groups also went on a high-fiber, low calorie diet. These were the results of the 12 week study, which was published in The Journal of The American Medical Association (a highly respected scientific journal): Heymsfield, et al.
1998 As you can see, both groups lost weight. But the group taking Garcinia Cambogia extract actually lost less weight (3. 2 kg 7 pounds) than the placebo group (4. 1 kg 9 pounds). The researchers also looked at body fat percentage. The placebo group lost 2. 16, while the group taking Garcinia Cambogia lost only 1. However, the difference was not statistically significant, meaning that the results could have been due to chance.
More Studies In another study with 89 overweight females, Garcinia Cambogia did Hauwfrauen to 1. 3 kg (2. 8 pounds) more weight loss compared to placebo, over a period of 12 weeks. They found no difference in appetite between groups (8). Overall, I looked at 4 more studies. Two of them showed weight loss of a few pounds over a period of 8 weeks (9, 10), but the other two showed no effect (11, 12).
So… unfortunately, the weight loss effects appear to be both weak and inconsistent.