If I had to get in the shower every time I saw μg/kg it would be obnoxiously frequent as eg the mammal dose of ivermectin is 200 μg/kg and it's still useful for some skin mites and meningeal worm.
Reposted from
Randall Munroe
Symbols xkcd.com/2520
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I’ve been using Ivermectin only in the form of ointment so far
(I might be more than a little excited for you to renovate and live in a cave)