I don't want to sound jaded, but the longer I'm around the industry, the more I find out things that are just wrong with it. Sadly, many of the younger, and newer folks are either naive, or just uninformed and get taken advantage of.
Supplement wise, it's just ridiculous. The # of companies putting out crap is just insane, and anyone who is in any type of decent shape, or who has done a single show is lining up to be "sponsored" and hawk their crap on every social media outlet available.
IMO there are only a handful of lines that have proven quality over a considerable length of time that I recommend to clients. Everything else? It's a total crap shoot.