my buddy got me some clen from mexico straight from the pharmacy, i dont know what lab because the smuggler took it out of the container to get it across and my friend doesnt remember the brand. . anyways i have taken up to 8 tabs at once and i still dont get the jitters.. my leg shakes a little when i leave it suspended but thats all... the pills are white, with a design on the back kinda like a R with on oval around it.. i would post pics but i dont have a camera..because im not get the jitters does that mean its probably fake?