Is diet coke isotonic

Diet Coke is not considered isotonic. Isotonic solutions have the same osmotic pressure as bodily fluids, typically around 300 mOsm/L, which allows for fluid balance. Diet Coke, with its carbonation and various ingredients (like artificial sweeteners and caffeine), does not match this osmotic pressure and is instead classified as a soft drink. It may be hydrating but is not designed for rehydration like isotonic sports drinks.