Here's a page listing numerous cites that nicotine is an appetite suppressant: http://tinyurl.com/yn6tj6
Cigarettes, which deliver more nicotine faster than cigars sure were. When I used to get hungry, and didn't have time to eat, I'd smoke a cigarette.
Still, even though I only smoke cigars now, when it's lunch time often I think 'I'll just have my daily cigar first,' and often end up not eating, despite having the time.
I bet if the original poster didn't use any tobacco products at all they'd still have a keen interest in food.