I am sorry if this is a common question. But I just came across the thumbnail for a youtube video about Nazi meth use and "supersoldiers". I didn't watch it, but I remembered that Hitler was using some sort of amphetamine up until his death. Not only that, but some soldiers were given the same drug to "perform better".

When it comes to ACTUAL usage of amphetamines, how prevalent was it? Is it possible that it was a drug to be used only by elite units? If it was produced, then how much? How much do we really know about Nazi meth usage?