Not a prohormone, overpriced but effective... About 10 months ago when i was just beginning my journey as a hardcore lifter the GNC guy sold me on this... I was stupid at the time, diet was horrible, even drank frequently on it, but still made awesome gains... Bench climbed about 30-40 pounds and all gains stuck... I ran it for a month at 6 pills per day and those gains were definitly not due to my diet or training... I had been lifting for 3 months so some of the gains might have been just from being a beginner, but I attribute atleast the bulk of my gains to the P6... Effective, but not worth the money in my opinion