Well if you are in week 3 and not sure you are feeling something then I may start to worry a bit. However up until then it is a little hard to say. Either way Nate is going to back up his money back offer as usual so if you don't want to risk it send it back. If you give it a shot and it is not any good you can contact him from the RLS site and he will take care of you. I have a couple bottles of this too and have chosen to hold on to them. I can't use them right now due to an injury but have faith that they will be okay. If not I can get my money back.