I think this is quite different because (1) creatine has been proven to be completely harmless for people of all ages absent some rare thing like a kidney disorder and (2) it has a bunch of clearly measurable positive effects.

So this is more like trying to determine whether ginseng is good at keeping away colds or whatever. Maybe it does (actually quickly searching this, it definitely does but let's pretend it's as folksy as it sounds for a minute) but even if it doesn't then it's harmless and has a bunch of other effects, so when one takes it - the whole possible cold prophylaxis can just be seen as an added perk.

Issue being that if you took everything that's "probably harmless" at once, cramming your body full of supplements, you might just end up harming yourself with substances that are toxic above certain amounts (acute iron toxicity etc.). Also the more random stuff you take, the more likely it is that something you took actually does turn out to have been harmful later.

So no, you should not take something merely because it's "probably harmless".

Is there a particular rare kidney disorder that creatine is contraindicated for? Because kidney disease is not rare, something like 14% of US adults have kidney disease.

This is basically "wanting" it to be true then it actually being there are so many variables and so many other things that even the minuscule benefit you gain from this heavily marketed science backed supplement could get completely offset by your other lifestyle problem like poor inconsistent sleep. I at one point was deep in this "optimizing" phase listening to all these pseduo-intellectual channels like "What I've Learned" and articles like the one linked and they always overblow the finding to support some conclusion. I tried creatine for full year and didn't felt any different no extra 20% energy nothing still fatigued after work same with fish oils all this stuff is at best either placebo or in case of creatine only tiny benefits that might only be felt by someone really at peak of their training.

The actual things that I now swear by and actually help is consistent sleep of whatever hours that doesn't make you feel sleepy in the day/night (depending on shift) since actual consistency matters more then timing and also in case of workouts really balancing the fatigue to intensity ratio. I understood this late and thought one should always push hard but there needs to be a balance. It's kind of like how cheetah can run really fast but only for 20-30 seconds and then it needs a 30 minute reset period or something. So if you go to failure or always at very high intensity it affects later sets and increases recovery period and in a way driving down overall weekly sets/volume which is main hypertrophy factor.

It’s not completely harmless, for me it causes heart palpitations that are so bad my watch tells me I’m in atrial fibrillation. Yes I know this sounds crazy. I’ve ruled everything else out. No, it is not creatine mixed with caffeine or whatever. Just pure creatine. No, I don’t have any other heart issues. I can give myself an irregular heartbeat just by having some creatine. It doesn’t happen otherwise. I have seen a cardiologist, he said it’s rare but it is theoretically possible.

> (2) it has a bunch of clearly measurable positive effects.

Clearly measurably neutrally and scientifically -- or clearly measurable as measured by supplement company funding studies or cherry-picked by health influencers?

and the thing people seem to not understand: how exactly do you _expect_ to be able to notice this change? Its something that happens after you take it for a prolonged period of time (>7days) and only has a minor/medium effect.

It doesn't make you a genius. I think a better view on it is that it may mitigate some of the adhs symptoms (at least for me).

I can keep on track for a significantly longer time since ive started supplementing with it at ~15g/day - and while i dont feel a difference, i can observe it when actually paying attention to what i do / how often i drift off etc.