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Am hiking across Northern Spain in August, there's not going to be a massive amount of places to buy things and its going to be hot. I want to take an isotonic drink mostly to replace what is lost through sweat (rather than any energy needs). I know lucozade do powder but I got a free sample and it seemed quite bulky for what I'll need (am carrying it all on my back and will require a 20 day supply).
Whats the best alternative, would be happiest if I could take the bare minimum of weight and like I say the energy requirement is minimal and is purely as rehydration (not bothered about taste much either).
Any suggestions or should i just cover my food in a combo of Salt and Lo-Salt?