Garcinia cambogia is actually a small, sour, purple fruit native to India and Southeast Asia. Its rind has traditionally been used as a food preservative, flavoring agent and as treatment for stomach bloating and gas. In India, it is also used as being a remedy for rheumatism and bowel problems. The active ingredient is hydroxycitric acid (HCA). Although some data from animal studies claim that HCA may suppress appetite and also the formation of fats and cholesterol within the liver, I’ve seen no evidence of its usefulness for weight loss. A 2011 British review of 9 studies concluded that supplementation with dr oz garcinia cambogia may lead to short-term weight-loss, but a more recent human trial from Korea that compared the effects of GCE and another supplement, EGML, an extract of the leaves of Glycine max (soybean), discovered that neither led to weight loss.
They recruited 86 overweight adults between the ages of 20 to 60 and checked their weight, cholesterol and diet. They then divided the participants into three groups and randomly assigned those to take tablets containing two grams of either GCE or EGML, or perhaps a placebo containing two grams of starch. The research subjects continued with their regular diets and took the supplements for 10 weeks.
Results demonstrated that neither supplement had any effect on the participants’ weight or led to modifications in body mass index or waist-to-hip ratio, important risk factors for heart disease in overweight individuals. They reported that within the EGML group, HDL (“good”) cholesterol increased when compared with those using the placebo. Aside from that, no significant changes in cholesterol or triglyceride levels were observed with either supplement.
They noted that natural food supplements such as EGML have been thought to increase satiety, and, consequently can help reduce calorie consumption. But in this study, they saw no effects on either satiety or calorie intake. In reality, they reported increased calorie and cholesterol consumption in all three groups and suggested that the explanation may be that when participants were recruited they likely under-reported how much they customarily ate.
You may see claims that Garcinia cambogia can promote weight loss by increasing metabolism (the speed where the body burns calories) and suppressing appetite, nevertheless the Korean investigators saw no evidence iejwom such effects. And I will tell you that this safest and best approach to improve your metabolism is not through a supplement or drug, but with regular exercise.