Also, sour patch kids have a weird ingredient in the coating that most electrolyte stuff doesn’t have. Potassiumsomething something, irrc?

Probably you’re referring to tartaric acid, potassium bitartrate. It’s added to candy to stabilize invert sugars, keeping them from crystallizing. You can buy it in powder form, usually called cream of tartar.

I don’t know what it does for hydration, but I suppose it would help top up potassium levels.