from 2017:
He's done this for years. For virility. People are strange.
https://www.inverse.com/article/34347-vladimir-putin-deer-blood-bath
Edit: more: http://siberiantimes.com/other/others/features/f0145-would-you-take-a-blood-bath-to-boost-potency-restore-beauty-or-hold-back-ageing/ (not a secure site)
Another edit: that second article is disturbing.
