Water

Also known as:  H2O

Chemically Water is comprised of Hydrogen and Oxygen and is essential for human life (obviously).

Alcohol Detoxification

 Drinking Water before, during and after the consumption of Alcohol may help to prevent the side effects of Hangovers associated with Alcohol's diuretic actions. 

Cardiovascular System

 Continual, long-term Water deficiency (i.e. Dehydration) may be a contributory factor in some cases of High Blood Pressure. 

Cells

 66% of the human body's Water is concentrated within the body's Cells - within the Intracellular Fluid of the Cells:

 All human Cells are comprised of 75% to 85% Water.

 The Bloodstream controls the amount of Water incorporated into Intracellular Fluid.

Digestive System

 Water may alleviate Constipation (drink a glass of warm Water first thing in the morning). 

 Water is a component of Saliva.

Excretory System

 Dehydration occurs as a result of Water deficiency.

 Water irrigates and cleanses the Kidneys and acts as a carrier vehicle for the Kidneys' excretion of Toxins from the body:  ^[1]

 Kidney Stones may be prevented by drinking sufficient Water (enough to produce 2 - 3 quarts of urine per day). 

 Water is the vehicle for the elimination of excessive Uric Acid from the body.

 Water functions as the carrier vehicle for Perspiration (and via Perspiration it helps to regulate Body Temperature).

Eyes/Vision

 Water (cold Water applied topically as an eyewash) may alleviate Conjunctivitis. 

Immune System

 High intake of Water may reduce the risk of Cancer - Bladder (by up to 51%).  ^[2]

 High consumption of Water may reduce the risk of Cancer - Colon.  ^[3]

Metabolism

 Water comprises 10% of the body's Adipose Tissue.

 Increased intake of Water may increase Basal Metabolism (BMR), primarily because the body uses Energy to heat cold Water to body temperature.  ^[4]

 Water is the medium for numerous reactions involving bodily Enzymes.