Hello,
I am the self proclaimed ambassador FOR the bars....
Usually they don't slow the losses but you will have to drink some extra water when you eat a bar. I always have 1/2 bar followed by 1/2 pint of water...
The one thing you might get is a gurgely tummy..mine sometimes sounds like I have eaten a medium sized grizzly bear.....and some people experience constipation or the opposite....
They are worth a try..they keep me sane too..
Oh, my favourites are: Chocolate, Toffee, Caramel and Chocolate Orange...(I hate peanuts and cranberries...)
Good luck and good chew..(as they really are a good workout for your jaw....)
xxx