VITAL FOR LIFE
Two parts hydrogen and one part oxygen (H2O) water is the most abundant substance in the human body, accounting for up to 60 percent of our body weight. Even though water has no calories or other nutrients, we can go for only a few days without it. In contrast, a healthy person can survive for 6 to 8 weeks without food. A loss of only 5 to 10 percent of body water results in serious dehydration, while a 15 to 20 percent loss is usually fatal.
Water is essential to virtually every body function, including digestion, absorption, and transport of nutrients, elimination of body waste, and regulation of body temperature, as well as many other chemical processes. It provides a protective cushion for body cells, and in the form of amniotic fluid protects a developing fetus. Water is needed to build all body tissues and is the base of all blood and fluid secretions such as tears, saliva, and gastric juices, as well as the fluids that lubricate our organs and joints. It also keep our skin soft and smooth.
As our body ages, it becomes dryer. The body of a newborn infant is 75 to 80 percent water, compared to 50 percent after age 65 or 70. This drying out is reflected in the wrinkled skin, reduced saliva flow, and stiffened joints that occur naturally with aging.
Spring water. Flows from a natural underground spring source. Once the water is collected and bottled, it must have the same properties as it did underground. In theory at least, this water is better protected from pollution than river and lake water.
Mineral water. This is spring water that contains at least 500 mg of minerals per quart (or per liter). Some mineral waters are naturally carbonated because they contain carbon dioxide, while it is added to other types.
Drinking water. Bottled water can come from a spring or a municipal water supply. It is treated by distillation, deionization, or reverse osmosis. Other terms for water treated by one of these processes include “distilled water”, “ deionized water” and “reverse osmosis water.”
Carbonated water. Bottled water that contains natural or added carbonation. Soda water tonic water are considered soft drinks, not bottled water.