According to me, almost all forms of HCG (injections, drops and pellets) are safe to use, so long as they are purchased from a legitimate provider. But, often it is considered that injections are the most effective form of HCG delivery. Why because, they directly increase the blood levels of HCG. Equally, they make the hormone immediately available to the body to metabolise fat. Hence, the drops offer a secondary option in this case.