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. A review published in the Journal of Obesity in 2011 that looked at 12 clinical trials found that Garcinia Cambogia can increase weight loss by about 0.