Honestly, it took me 6 weeks to really, really start to feel it. I took 750mg for a month straight, instead of the first two weeks. Then I dropped down to 550mg. I see some results in my muscles, but I feel like I should feel a lot stronger. My body has a very, very high resistance to drugs, it is not even funny. I get no side effects from anything, and I need a lot of something to get its full effects. Probably from all the stupid things I did when I was younger. =/