Woody Harrelson turned vegan in his 20s after a stranger promised him it would cure his chronic acne - and he credits the decision with turning his life around.
The actor claims a meat and dairy diet ruined his skin and left him lethargic and sluggish.
Harrelson, 49, has been a vegan for 25 years, and now only eats raw foods.
The No Country for Old Men star tells Maxim magazine, "It's been at least 20 years. I used to eat burgers and steak, and I would just be knocked out afterward; I had to give it up.
"The first thing was dairy. I was about 24 years old and I had tons of acne and mucus. I met some random girl on a bus who told me to quit dairy and all those symptoms would go away three days later. By God she was right."