check out reddit /r/supplements if you want to peek into the hypochondriacs that have a lot of overlap with these syndrome communities.
They will say taurine made them bloated and gain 20lbs, that 5,000iu of vitamin d3 makes them feel like they have hypercalcemia. They expect to "feel" 500mg of vitamin C.
I won't go into the long story, but I was an early user of propecia long before "finasteride syndrome" was a thing, and I spotted the first signs of MPB.
I had all the symptoms (I'm clearly hypersensitive to DHT levels). It was awful, went from a sex maniac to a depressed monk. Hard time getting it up. I distinctly remember the panic, that only got worse when things didn't go back to normal a day, or even a week after stopping.
Things did go back to normal after a month, but I warned everyone to stay off that crap for decades.
As "finasteride syndrome" hype started being spread I thought great, finally folks are seeing the danger.
Only after learning about hormones, and seeking how devastating E2 crashing could could be scaring guys off AIs forever, seeing the parallel I took another really close look at finasteride.
After 30 years of medical research, there's nothing substantial there, other than the psychosomatic effects of finasteride panic made much worse by the hype.
I read very low dose was 95% effective as the normal 1mg, so decided to try .25mg, still traumatized, and I defiantly felt its effects, but they were very mild. I stuck with it, the side effects went away, my hair improved significantly. and I realized how unnecessarily afraid I was for all those years.