The increased strength has taken its toll on my joints. My elbows, knees, and wrists are starting to ache. I have lowered my IGF dose to get some more time out of it since Silk is also using it and that may be partially responsible, but I don't know. I do about 50-60mcg on off days and 70-80 on training days. I would think that would be enough, but my strength is starting to approach pretty impressive levels. I'm not a strong guy relative to my size. I'm not sure how I'm going to handle that. I do very high reps and I use as little as I can. I may start doing heavy pre exhaustion or drop sets. We will see