but certainly not enough to be noticeable. Believe me, if it were I would be a size two! I eat habaneros as snacks throughout the day, and I don't think i've ever even cooked a dish without chili's before. It does tend to kill my appetite.
Then again, maybe your metabolic reaction to it varies with your spicy tolerance...? Like you have to have that heart rate, break out in a slight sweat reaction or something, which i'll admit I haven't been able to get even from a habanero in years. So i'm probably not the best example.
On the flip side, they do provide tons of vitamin C and ease the symptoms of colds, sore throats, and sinus infections.