Funny

Thanks to the rapid enshittification of Google I can't seem to find the actual studies anymore but it's just how your body and homeostasis works. You can find plenty of older body building forums talking about it though, it was just a known fact.

The good news is it's by all accounts pretty temporary, about 1-3 months before you return to pre-supplement levels. The problem as always is these studies are never on long term effects, they'll give people 3-5g for a few months and then record the results.

It's never "we made gym rats stop their twenty year old habit to record what happens because they're gym rats and who the hell knows what else they put in their body."

Creatine is probably safe if you keep it below 3-5g. The point is that we don't know the long term negatives and the benefit isn't building more muscle it's having more energy for the workout.

If you're not the type of gym goer that exhausts themselves every day you don't need it.