Active sports and fitness programs involve lots of good, healthy perspiration, but odors are not welcome in most social situations. Applying chemicals to the skin can cause irritation and block natural pathways for the body’s cooling and cleansing systems. The quandary; “work out -- or smell clean?”

Natural body ways of blood cleansing are through liver, immunologic system, kidneys, perspiration glands, digestive tract and lungs. These organs receive the toxins from the blood through the capillaries.

A new comprehensive life-support system for the International Space Station (ISS) centers on a water recycling system whose specially designed filters and chemical processes cleanse waste liquids--notably astronauts' urine and perspiration--so that they become refreshing, drinkable water.