HCG has been used for years by numerous individuals to lose weight at an accelerated pace. Not only do the results speak for themselves, but research has proven that HCG has a profound effect on weight loss, and lean body mass. HCG Shots Increase Hormone Sensitivity - HCG has been shown to increase the sensitivity to important fat loss hormones. Decreases Hunger - Individuals who are overweight are highly likely to have reduced hunger while taking HCG Injections. Increased Fat Metabolism - The overall effect of HCG, is to optimize the body to burn fat, rather than lean body mass..