First of all, HCG may be one of the causes of the joint pain. It is very hard to control the real estrogen levels with HCG, and a disbalance in estrogen can cause joint pain. Then comes the fact that on juice you will workout much harder with more loads than usual. Your muscles may be ready for that, as they tend to grow really fast, but the joints usually require more time to get stronger.
Personally, for many years I have been having some serious tennis elbow issues, which would not allow me to workout. In fact, the pain would sometimes get so intense, that I could not even open a door. During all those years nothing would help me. Then I have tried the stack of ostarine and N2Joint RX, and let me tell you that I was amazed with the results. My elbows got well rather fast, and now they feel like new. Basically, thanks to this stack I was able to start working out with full force again. Therefore, I can personally vouch for the effectiveness of this stack. Wish I knew back than that I could also stack in there some Nutrobal Mk-677 for more enhanced results - who know, maybe my recovery would go even faster.