I would check the sugar content on the label. I believe vitamin water, much like Gatorade, has a lot of sugar in it. Another alternative would be coconut water. Less sugar (11g - 15g for vita coco brand), very hydrating, and there are brands with different flavors like peach and mango, lemonade, pineapple, and orange.One other alternative is something called Nuun. They're tablets you dissolve in a glass of water that are flavored and have less than a gram of sugar (at least the berry one I have does). You find them in the grocery store usually around the natural food aisles near the Cliffs and energy bars, etc.However I would say to double check with your doctor if you plan to drink them every day or multiple a day as these are all electrolytes which means they contain usually sodium, potassium, magnesium among a few other things to help the body hydrate. You want to make sure it's okay to take in quite a bit extra of those things. I know as a runner if I drank too many electrolytes without balancing with water it would give me digestive issues. I hope this at least gives you other options!