Z
Zein
It is the principal protein in corn. Used in face masks, nail polishes and plasticizers. Obtained as a yellowish powder by extracting corn gluten with alcohol. No known toxicity.

Zinc
Zinc is essential to the synthesis of DNA and RNA, of proteins, insulin and sperm. The body needs zinc, too, to metabolize carbohydrates, fats, protein and alcohol; to dispose of carbon dioxide; to make good use of vitamin A. More than seventy different enzymes require zinc to do their appointed work. And that's not all. Zinc bolsters the immune system and makes wounds heal faster. It's integral to the growth and maintenance of body tissues; it plays a major role in the development of fetuses and the growth of children. It even hones the palate

Zinc Chloride
Also called "Butter of Zinc". It is a compound occasionally used in escharotic skin creams salves for the treatment of skin cancer and other dermal/epidermal conditions. Zinc chloride assists in the absorption of the herbal nutrients active ingredients of this formulation through the dermal layer and into the bloodstream.

Zinc Oleate-Stearate
A white, greasy powder, insoluble in water (only in alcohol). Used as antiseptic in cosmetic creams and to  treat eczema and other skin rashes.

Zinc Peroxide (zinc superoxide)
White powder. Used as disinfectant, antiseptic, deodorant and astringent applied as a dusting powder alone or with talc. Liberates hydrogen peroxide, a bleach.

Zinc Pyrithione (zinc pyridinethione)
An active ingredient in dandruff shampoos. Its actions include: cytotoxic and antifungal. Caution: This ingredient may have side effects and is not approved by the FDA.

Zinc Oxide
An oxide of zinc, an astringent (a substance that removes oil from the skin). Used to protect, soothe and heal the skin. Also provides good sun protection.

Zinc Stearate (zinc soap)
A mixture of the zinc salts of stearic and palmitic acids. Widely used in cosmetic preparations because it contributes to adhesive properties. Also used in powders to improve texture and to lubricate and used as a coloring agent. For example, baby powders of 3-5 % zinc soap are water repellent and prevent urine irritation.

Zirconium
Bluish black powder or gray-white flakes sued as a bonding ingredient and abrasive, also used in the preparation of dyes. High-quality zirconium is used as a pigment toner and solvent. Is is also used in deodorants and antiperspirants.