Large Intestine & Rectum Functions & Roles in Water Absorption Video Staying hydrated is as important as eating fruits, veggies and protein every day. Water supports every system in the body from regulating temperature to aiding digestion. Helps prevent constipation and How important is drinking water, really? Wellstaying hydrated: Increases brain function and energy levels Lubricates joints and reduces inflammation Prevents infections Keeps organs functioning properly Water needs for different organs Why is Water so Important for the Body?