picked up this interesting little book at christmas "Shi**ing Pretty" all travellers tales on loos etc.Written by a doctor with a lot of info on B.B THE TROTS etc
One piece of advice is that after each trip to the loo you drink 2 glasses of water to rehydrate yourself.My favourite tip is a can of coke with a small pinch of salt in it or even a squeeze of lemon juice.
This replaces the electroydes lost.
Interesting !!!!