Health influencers push whatever they get paid to push. Presumably whoever makes the stuff saw a market opportunity. As you say, it could be that the vitamins

Health influencers push whatever they get paid to push. Presumably whoever makes the stuff saw a market opportunity. As you say, it could be that the vitamins market is tapped out, meaning it's a booming market but too much competition has erased margins, so they need a new thing to push. Personally I'm waiting for influencers to push sodium-chlorinated dihydrogen monoxide injections. Clinically proven to be extremely safe in terms of side-effects, and look at all the benefits!