i um and ah over this all the time. for me, coke zero is a GREAT appetite suppressant. if i'm hungry, and have eaten not long ago, one of these will tide me over for like 2 hours. but it s wreaked absolute HAVOC on my teeth. had one extracted last thursday, due for two fillings in 2 days. then a possible root canal. plus 8 fillings to go. thats on top of my bludy 4 widsom teeth coming out. i have friends that have lost like all their teeth. i'm 23 btw. it sucks. so i'm keeping to weekends only. and always through a straw, so it doesn't hit my teeth!!