The Never List
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Benzalkonium chloride: a disinfectant used as a preservative and surfactant associated with severe skin, eye, and respiratory irritation and allergies. Found in: sunscreens, moisturizers.
Environmental impact: very toxic to aquatic life
 
BHA and BHT: synthetic antioxidants used to extend shelf life. They are likely carcinogens and hormone disruptors and may cause liver damage. Found in: lipsticks, moisturizers, diaper creams, and other cosmetics.
 
Coal tar hair dyes and other coal tar ingredients: a byproduct of coal processing that is a known carcinogen. It is used as a colorant and an anti-dandruff agent. Found in: hair dye, shampoo.
 
Ethylenediaminetetraacetic acid (EDTA): a chelating (binding) agent added to cosmetics to improve stability. May be toxic to organs. Found in: hair color, moisturizers.
 
Ethanolamines (MEA/DEA/TEA): surfactants and pH adjuster linked to allergies, skin toxicity, hormone disruption, and inhibited fetal brain development. Found in: hair dyes, mascara, foundation, fragrances, sunscreens, dry cleaning solvents, paint, pharmaceuticals.
 
Formaldehyde: used as a preservative in cosmetics. A known carcinogen that is also linked to asthma, neurotoxicity, and developmental toxicity. Present where quaternium-15, DMDM hydantoin, imidazolidinyl urea, diazolidinyl urea, sodium hydroxymethylglycinate, 2-bromo-2-nitropropane-1,3 diol (Bronopol), and several other preservatives are listed. Found in: shampoo, body wash, bubble bath.
 
Hydroquinone: a skin-lightening chemical that inhibits the production of melanin and is linked to cancer, organ toxicity, and skin irritation. Found in: skin-lightening creams.
 
Methylisothiazolinone and methylchloroisothiazolinone: chemical preservatives that are among the most common irritants, sensitizers, and causes of contact skin allergies. Found in: shampoo, conditioner, body wash.
 
Oxybenzone: sunscreen agent and ultraviolet light absorber linked to irritation, sensitization and allergies, and possible hormone disruption. Found in: sunscreen, moisturizer.
 
Parabens  (methyl-, isobutyl-, propyl- and others): a class of preservatives commonly used to prevent the growth of bacteria and mold. Parabens are endocrine (or hormone) disruptors, which may alter important hormone mechanisms in our bodies. Found in: shampoo, face cleanser, body wash, body lotion, foundation.
 
Phthalates  (DBP, DEHP, DEP and others): a class of plasticizing chemicals used to make products more pliable or to make fragrances stick to skin. Phthalates disrupt the endocrine system and may cause birth defects. Found in: synthetic fragrance, nail polish, hairspray, and plastic materials.

Polyethylene glycol (PEG compounds): PEGs are widely used in cosmetics as thickeners, solvents, softeners, and moisture-carriers. Depending on manufacturing processes, PEGs may be
contaminated with measurable amounts of ethylene oxide and 1,4-dioxane, which are both carcinogens. Found in: creams, sunscreen, shampoo.
 
Retinyl palmitate and Retinol (Vitamin A): a nutrient that may damage DNA and speed the growth of skin tumors when used topically. Found in: moisturizer, anti-aging skincare.

Sodium Lauryl Sulfate and Sodium Laureth Sulfate (SLS and SLES): SLS and SLES are surfactants that can cause skin irritation or trigger allergies. SLES is often contaminated with 1,4-dioxane, a byproduct of a petrochemical process called ethoxylation, which is used to process other chemicals in order to make them less harsh. Found in: shampoo, body wash, bubble bath.
 
Synthetic flavor or fragrance: an engineered scent or flavoring agent that may contain any combination of 3,000-plus stock chemical ingredients, including hormone disruptors and allergens. Fragrance formulas are protected under federal law’s classification of trade secrets and therefore can remain undisclosed. Found in: all types of cosmetics.
 
Toluene: a volatile petrochemical solvent that is toxic to the immune system and can cause birth defects. Found in: nail polish.
 
Triclosan and Triclocarban: antimicrobial pesticides toxic to the aquatic environment; may also impact human reproductive systems. Found in: liquid soap, soap bars, toothpaste.  
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- Source: The Beauty Counter