All the bullshit supplements for sale that offer no proven gains at all, yet so many get suckered into them.
Full credit to the marketing teams, though. I mean if they can dress up something that is completely useless, is sold for an arm and a leg with bugger all manufacturing cost and dumb ass people believe the hype and buy it, good on them.
I really think far too many people who weight train on any level are always looking for the secret potion to short cut the hard work and sensible diet that's really needed to make great gains.