What do you mean by "work". Do they do what they claim? Most of themdon't. But many supps are excellant but you wouldn't necessarily know what they're doing -- such as Omega 3's, TMG, Co Q 10, ALC, MSM, lecithin, MILK THISTLE vitamins, minerals etc etc. Meawhile, Thermogenics can be "felt' but they're inferior for fat loss in the long run.
For bodybuilding purposes, well I beleive nothing is anabolic. (Some may say prohormos, but the catabolic aftermath negate the benefits) The closest thing to an anabolic supplement is one that lowers SHBG, therfore increases free testosterone and that is Unleashed from Protein Factory .com