Can you really? Or is it like making your own ketchup, or crisps, or KFC strips, which invariably means making a thing that is nothing like original (and probably tastes like crap, if it's the "healthy version of ~" recipe)? Can't compete with industrial production on quality and consistency - consumer kitchens aren't equipped for it.
Electrolyte water is 1L water, 1/2 tsp salt, 2T sugar. How you substitute and make it taste like whatever sports drink is up to you at that point. Blue gatorade is the above with blue flavor powder, maybe 1/2 lemon for flavor…and sub 1T sugar for honey to get potassium and magnesium. But really there is no “secret formula”, society is just lazy consumer whores.
I make my own crisps at home, and they are equal to or better than anything I've purchased. Except for salt-and-vinegar ones. I still haven't nailed that.
The downsides, though, are that it took me a great deal of experimentation to get the technique right, and making them properly is a bit of a pain in the ass. Also they're absolutely not healthier. They're junk food, same as any other.
