I get it from kane their RU has been tested like 3 times and they were always legit.
Make sure you thoroughly know how to handle/store everything to make it
20mg may or may not be enough, how much area are you trying to cover? Just your hairline? Nw5 area or more? If you are just covering like a nw4 area or less 20mg will probably be enough but if you are covering more I would do 40-50mg daily to be safe. El duterino maintained on RU alone for years after anti androgens stopped working for him I think he used 30mg daily
RU is the only thing that is capable of replacing finasteride if finasteride gave you sides. I wouldn't say it is a great replacement because there are little studies done on it, but it is your last hope and unlike natural treatments and such there is a study that showed it is capable of regrowing transplanted human hairs in mice, and we have a multi-year anecdotal report from a respected user with confirmed progressive diffuse thinning that shows at least he maintained everything on it