I'll be honest I'm still not sold on Epi. It's been in multiple products I've used that I feel I've gotten results from but I can't be sure. I look fuller and my muscles seem a bit harder. I'm sold enough on those results to buy more. They currently only have the OG formula without Epi but I still wanted the Epi so I emailed them and they had some bottles left. I think laxo is the better of the two compounds tho, so the OG formula is probably really good and was $5 cheaper when I looked.