Was looking at the composition of tomato juice as found in cartons in most supermarkets, and was thinking it could be an ideal post ride drink. Its about 3-4% carbs, a little protein and fibre but also salt and minerals. Would be isotonic, tastes good and definitely quenches thirst! Glug a pint down after a ride! Wouldnt have too much, as that salt is quite high - any thoughts?