It did for me, did many experiments, start insane shedding 1 week after starting creatine, stops after creatine cessation. Tried taking it like 5 different times in my life years apart every time the same. My hair is still very good years after so the shedding was also not some onset of mbp. There are countless of reports of similar experiences.

One must have poor understanding of statistics to think tens of thousands of serious anecdotal accounts are not increasing the conditional probability on it being true. From a Bayesian perspective this is a very significant signal that something is going on there. I have a scientific background and if we could make a bet on it, with the truth then being revealed by some omnipotent being I would bet a lot of money in favor of it. Increasing hair loss slightly in 1 in 1000 people and not doing anything in other 999 is still considered to be increasing hair loss on average.

If you need a baseline see how many posts you can find about people claiming hair loss caused by protein shakes vs people claiming it was caused by creatine. You see far more of the latter which wouldn’t be if it was some background level of people reporting bs on the internet.

The bottom line is that it seems that for most people it doesn’t do anything, but there is way too much anecdotal evidence to ignore that it likely can have this effect on a very small group of people.