Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A rather useless jar of stuff

I have several health challenges, and work out daily. At the least, I thought it might help with recovery, stamina or energy while working out, but it didn't. As for my general health, I didn't find that it helped with my energy level, nor did it have any affect on my immune system/strength. The bottom line is that I won't be buying it again, and while I got through nearly the entire jar, there is some remaining, which I probably won't bother with.Basically, it's cow's milk. Years ago, I favored Transfer Factor over the colostrum products, and now I remember why.