I've been on this forum awhile, and I don't get that sense about hcg from the members. At a minimum, hcg preserves fertility and the size of the testicles. It will also stimulate a little natural T production. Some actually mention a feeling of well-being from hcg. There can be T->E conversion in the testes which cannot be controlled with an AI, but I think that's only a problem in guys using large doses of hcg and/or are not using an AI at all.