As far as side effects, stanozolol is stanozolol, though with injectables one could
potentially have an impure product that
could cause a problem (not generally the
case though.) I’d guess that these claims
you’re hearing are just an urban myth.
On the 17-alkylation, enzymes can’t remove
the 17-methyl, and if it were removed
the molecule would be much less potent. That’s
why injectable Winstrol also has the 17-methyl.