Water is necessary in the body for many reasons. It acts as a solvent for nutrients. It is an important medium for chemical reactions within the body. Water also transports nutrients to the cells and rids the body of waste products. It lubricates the joints, facilitates food passage, and regulates body temperature through conduction of heat, perspiration, and excretion. The Dietary Reference Intake levels for water vary by age, gender, and health status (pregnant or lactating women need more water). Sources of water include beverages, soups, and high-moisture foods like fruits and vegetables.