A prohormone is basically a steroid that must be converted usually by the liver to the active ingredient. The most popular and well know prohormone is andro or androstenedione. Prosteroids require no conversion and are very effective. This is because they come in a ready to use active form and no potency is loss during a conversion. Make no mistake, prosteroids/prohormones are hands-down the most effective supplements for building muscle to hit the market. They work for one simple reason...they are steroids. You will get results and therefore they are work every penny if it's muscle that you want. One word of caution, don't fool around. If you try a prosteroids/prohormone and you're getting good results, you better stock up! Prosteroids/prohormones are real and the only reason they were ever allowed over-the-conter is because manufacturers found a loop-hole in the law. As you may well know, many good prosteroids/prohormones have been banned and as expected, manufacturers have found new loop-holes that allow them to offer new steroids. Let there be no elusions, these new legal steroids will be banned too. It's not a good feeling to look around scrambling trying to find a product that's no longer available. It happened before with such popular products as 1-AD, M-1T, Andro and more. Don't let it happen to you.