Water
Water is the most abundant and important substance on Earth as well as the human body. Water, fluids, and hydration are a critical part of nutrition that is essential to health.
Three simple elements, two hydrogen and one oxygen, are bound together forming the water molecule. All other nutrients can be found in this universal solvent. Most substances on Earth dissolve into it to varying degrees. Sixty to seventy percent of our body is water, the fundamental component of all bodily fluids. Blood, lymph, digestive juices, urine, tears, and sweat are all made up primarily of water. Practically all bodily functions, such as, circulation, digestion, absorption and elimination, depend on water. Water carries all-important electrolytes and mineral salts that convey electrical currents in the body. The macrominerals that make up the electrolytes are sodium, potassium, calcium, magnesium, and chloride.
Because water is such a good solvent it is the basis of all of our beverages. Water can also dissolve undesirable elements, such as toxic pollutants and pesticides. These can be difficult to remove and causes many complications with our ability to obtaining good quality drinking water.