HCG stands for Human Chorionic Gonadotropin. This is a hormone that is of great help to pregnant women and having its effect in the placenta; it also helps in normalizing the rate of anyone's metabolism, and therefore useful for weight loss. HCG drops are taken sublingually or underneath the tongue, so it can be absorbed easily while HCG Injection, as the name suggests are injected into the body with the help of a needle.
HCG drops no eating 15minite before and after usage and is used twice daily, but HCG injection is ones daily with no constrain as to the time of food. HCG drops are less expensive compare to HCG injection which effect is faster, drops are easier to obtain, unlike injections which you administer yourself exposing oneself to pain and coming to cost and ease of use, HCG drops is better and Regarding side effects, also because of the cost of the HCG injection in trying to reduce it some dieters order their supplies, mixing their HCG shot solution themselves, in which there might be mistakes.
Both HCG injections and HCG drops have both positive and negative effects, the decision of which to use depends on your lifestyle, budget, and which you are most comfortable with.