Characters who don’t eat or drink suffer the effects of exhaustion (see appendix A). Exhaustion caused by lack of food or water can’t be removed until the character eats and drinks the full required amount.
Food
A character needs one pound of food per day and can make food last longer by subsisting on half rations. Eating half a pound of food in a day counts as half a day without food.
read more Dnd5e-SrdWater
A character needs one gallon of water per day, or two gallons per day if the weather is hot. A character who drinks only half that much water must succeed on a DC 15 Constitution saving throw or suffer one level of ex…
read more