quotes a New York Post article that says Twain learned to hate alcohol
after getting sick from drinking at age 16. The page is unclear about
whether her stepfather let her get so drunk so she would learn the
dangers of drinking or if the lesson learned was unintentional.
According to this vegetarian site
(http://www.purecuteness.com/me/vegetarism.htm), Twain's marriage has
to do with her vegetarianism:
"[`]I don't eat meat, fish, or eggs. I was never a big meat-eater, but
I've got more energy now, [']says Shania, who hasn't eaten an animal
since she married longtime vegetarian (and record producer) Mutt
The Shania Fan Club (http://www.shaniafanclub.com/info.html) also
links Twain's vegetarianism to her husband.
I didn't find anything that specifically addressed why Twain abstains
from drugs (and demands the same of her band). However, it's hard to
imagine someone who abstains from alcohol, tobacco and even, according
to some accounts, non-procreative sex, would then go use heroin or
I hope this answer was what you were looking for.
Shania Twain drugs
Groups search: drugs group:alt.fan.shania-twain
Shania Twain vegetarian