TweetI never notice lethargy however I am always tired anyway. I think its like anything else people try for the first time First few weeks everything works great, 500mg of test worked great the first time, I am even willing to bet some people thought this or that gear worked great the first few weeks and later found out it was bunk? But looking back we thought it was working right? Happened to me before. I think Mk should be used a low dose and longer periods of time. Just because you don't feel something anymore doesn't mean its not working. This is why we do blood work

Also trust who your buying stuff from.