How many people here watch those stupid ab swing pro commercials or the like where they dazzle the world with how just swinging away for 15 minutes a day will 'shred kilos and give you a rock hard six pack'?
We all laugh because it's so ridiculous to us, who know that weight loss is diet, and getting a six pack is diet again, and certainly not easy.
But really, most of the supps that bodybuilder aspirants take are exactly the same as the ab swing pro: they don't deliver what you hope they will, and if they do, its due to confounding factors such as, and most importantly, the hard training and dieting you were doing along with the supplement. Placebo effect at best- you work out a little harder due to the added perception of reward to effort the supp is giving you. The reason why these supplements aren't viewed with the same disdain as the ab swing pro is that they are marketed differently. Ab swing pro is marketed at couch potatoes who don't know a thing about fitness: and it sells for that reason.
Bodybuilding supps are marketed toward people with nutritional knowledge and training knowledge, so they slap impressive labels on, doctor some lab results and add intense chemical names and throw in some top notch broscience and recruit sponsors. But in reality, it's just more spin aimed at a more specialized group.
And just like fitness pros who laugh at couch potatoes buying the ab swing pro, so do scientists, doctors and most especially, research companies and supp industries, except this time at the fitness freaks who think their buying the latest way to naturally lean out or bulk up or recomp, where in reality they are buying a placebo effect, which should not cost so much
Not to say no supps work: some supps have a place in adding that 5% like others have said. But really on that note, anyone who says a supp has added 5% to their results must be pretty precise with their measurements, because a +/- 5% tolerance for results which are sometimes as small as a few lbs of fat or muscle, is pretty darn hard to judge
Stick with the staples (or go to proven compounds like aas or ph), and invest the rest back into the training and diet. My opinion anyways