 Water often contains naturally occurring micronutrients such as calcium and salts, and others can be introduced to the water supply such as chlorine and fluoride for various purposes such as sanitation or dental health.Dietary fiber or roughage, found mostly in vegetables (and fruit), is crucial to the health and normal function of the human digestive system..In sports, fitness and bodybuilding the term macros is used extensively to refer to macronutrients (protein, carbohydrates and lipids).