Water plays many roles in human physiology, including:
Lubrication: Water lubricates joints and saliva.
Temperature regulation: Water helps regulate body temperature through perspiration.
Nutrient and oxygen transport: Water carries nutrients and oxygen to cells throughout the body.
Waste removal: Water helps remove waste through urination, perspiration, and bowel movements.
Food conversion: Water helps convert food into energy.
Constipation relief: Water helps prevent and relieve constipation by moving food through the intestines.
Skin hydration: Water intake can improve skin thickness, density, and hydration.
Water is vital to human health, and humans can only survive for about a week without it. The amount of water a person should drink each day depends on factors like age, sex, and activity level. The Academy of Nutrition and Dietetics recommends that women drink 11.5 cups of water per day, men drink 15.5 cups, and children drink 5–11 cups.
Dehydration can cause a number of health issues, including unclear thinking, mood changes, overheating, constipation, and kidney stones.
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