I have a friend that got a little ripped up, well he's not really my friend he's just some guy that I say whats up to at the gym. I asked him what he takes and he said he takes SDI products. He said he takes the d-bol and vinni. I did some looking on their sites and I don't really know what to think. Has anybody tried them or do they really work. Or are they just a waste of money.