This article is from the X-Men Comic Books FAQ, by Kate the Short (firstname.lastname@example.org) with numerous contributions by others.
Only if you only reread one annual.
In Uncanny X-Men Annual #11, the X-Men get involved in this very
symbolic quest to determine the worthiness of the entire human race, and
all that other light afternoon sort of entertainment. In the end, only
Wolverine is left to strive for the goal, this immensely powerful alien
god-gem gadget thingee. Unfortunately for Wolverine, the alien Horde is
right behind him, and slaughters the poor mutant--but not before a
single drop of Wolvie's blood lands on the immensely powerful alien god-
gem which super-cosmically charges the superpowers of that blood to
regrow an entire Wolverine, adamantium bones and all. In short, don't
try this at home, kids, at least not without an immensely powerful alien
god-gem of your own.
The simplest evidence against Wolverine having this amount of
regenerative ability, however, is that in the numerous issues with no
alien god-gems in sight that Wolverine gets pounded in, none of the
blood he's leaked so copiously over everything has ever grown into