All Those Powders and steroids...

Does anyone actually use any of those commercial products for gaining muscles faster etc. I know some people go all out and have tanks of some sort of gas etc... But honestly i think they must all be there just to make money not to actually work... surely if you eat your 5 a day and drink lots of water you will be better than 3 protein shakes and 20 vitamin tablets a day. :S what are your thoughts?