It is naturally flavored spring water sweetened with Splenda. There are several flavors: Orange, Raspberry, Lemon, and Strawberry. Amazingly.....they taste like fruit juice. The orange is awesome! This sounds great and all.....being sweetened by Splenda.....and that it is no cal...no carb. However, in the ingredients it list sucralose.......how concerned should I be? I really like it.....it's a great substitute for the morning O.J., but could it stall me out?