Mercury is both a deadly poison and a heavy metal. The skin easily absorbs mercury, and it accumulates in the body. Mercury exposure may cause allergic reactions, skin irritation, or neurotoxicity problems.
Phenyl mercuric acetate is a highly toxic chemical used as a preservative in eye makeup, even though it does not protect the consumer from bacteria in products that have become contaminated by use.
Bronopol is used in mascara and other cosmetics. A skin irritant, bronopol has caused blindness and death in laboratory animals at concentrations much higher than used in cosmetic products.
Formaldehyde-releasing ingredients are found in nearly all brands of skin, body, and hair care products, antiperspirants, and nail polishes. Imidazolidinyl urea and DMDM Hydantoin are just two of many preservatives that release formaldehyde, which can irritate the respiratory system, cause asthma, allergies, or skin reactions, even trigger heart palpitations. Formaldehyde exposure can cause joint or chest pain, depression, headaches, fatigue, dizziness, immune dysfunction, and cancer.
Hexamethylenetetramine is a carcinogenic formaldehyde-compound used in lotions and creams, and must carry a warning label if used in concentrations greater than 0.05%. Trade names: Aminoform, Formid, Uritone, and Cystamin.
Lanolin, a fatty secretion from sheep's wool, is found in many cosmetics. Although lanolin is a natural product, it may be contaminated with DDT and other pesticides used on the animals.1
Information found at townsendletter.com