5. Water
Almost every cell in the human body needs water to function correctly. We are made of 55 to 75 percent water and need constant replenishment. By the way, lean people have more water in their bodies because muscle holds more water than adipose tissue.
According to the Cleveland Clinic, the lungs expel between two to four cups of water each day just from normal breathing! While dehydration would take a 10 percent loss of bodyweight in fluids, a mere 2 percent is enough to affect athletic performance, cause fatigue and dull thinking abilities. Healthy water consumption lessens the chance of kidney stones, reduces the severity of colds, prevents constipation and keeps joints lubricated.
