Confused.com...im trying to follow the 5:2 diet but im getting really confused with counting the calories as they all differ..on line it says 2 original ryvitas are 64cals..ive just got a box of them and this says 19cals each!! Quite a difference when were meant to counting everything I think! In the 5:2 book it says hot chocolate low fat per 100ml is 19cals,w/w hot choc made with 200ml water + 3 heaped tsp (11g) is 40cals..shall I just go off the packaging?? :-/