take the water you use to soften the beans overnight and drink it.
Same with water boiled to soften the beans.
or you could use the water for your rice. The great thing about rice and beans is they are chock full of H20 that you put into them so you will have a nearly full rate of return for digestion and absorption.
The food you should ignore if you can are any meats off the hoof. The require a tremendous amount of water to digest.
Best to stick to wings or fish. Easy to digest and require very little water for digestion.
In fact, fish requires only the water it contains for digestion.
Don't do that. It contains the tri-saccharides and the breakdown products that WILL cause gastric distress.
You may lose more water from the screaming sh@ts than you gain from the liquid.
Distill it, and it would be ok.
/johnny