Element percentages in the human body.<unk> s are the<unk> s subset of<unk>  elements; that is,<unk> s normally present in small but measurable amounts in animal and plant cells and tissues and that are a necessary part of nutrition and physiology. Many biometals are<unk> s. Ingestion of, or exposure to, excessive quantities can be toxic. However, insufficient plasma or tissue levels of certain<unk> s can cause pathology, as is the case with iron.<unk> s within the human body include iron, lithium, zinc, copper, chromium, nickel, cobalt, vanadium, molybdenum, manganese and others.<unk> s are<unk> s needed by living organisms to function properly and are depleted through the expenditure of energy by various<unk> olic processes of living organisms. They are replenished in animals through diet as well as environmental exposure, and in plants through the uptake of nutrients from the soil in which the plant grows. Human vitamin pills and plant fertilizers can be a source of<unk> s.<unk> s are sometimes referred to as<unk>  elements, although the latter includes minerals and is a broader category. See also Dietary mineral.<unk>  elements are required by the body for specific functions. Things such as vitamins, sports drinks, fresh fruits and vegetables are sources. Taken in excessive amounts,<unk>  elements can cause problems. For example fluorine is required for the formation of bones and enamel on teeth. However, when taken in an excessive amount can cause a disease called "Fluorosis', in which bone deformations and yellowing of teeth are seen. Fluorine can occur naturally in some areas in ground water.<unk> s include iron that can help to prevent anemia, and zinc that is a cofactor in over 100 enzyme reactions.
Trace metal
Vitamin
Metaldehyde
Polychlorinated biphenyl
Polychlorinated naphthalene
Organophosphate
Hazardous drugs
Fruit salt