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Butylated hydroxytoluene (BHT) is a toluene-based ingredient used as a preservative in food and personal care products.

Rd&c Yellow colorant

Ci 19140 or Tartrazine is a super common colorant in skincare, makeup, medicine & food. It?s a synthetic lemon yellow that's used alone or mixed with other colors for special shades. FDA says it's possible, but rare, to have an allergic-type reaction to a color additive. As an example, it mentions that Ci 19140 may cause itching and hives in some people but the colorant is always labeled so that you can avoid it if you are sensitive.

Colorant "Rust" red. It's red iron oxide.

Cyclopentasiloxane (cyclomethicone) is a silicon-based cyclic compound; may be associated with environmental toxicity. (Source : EWG)

Dimethicone (also called polymethylsiloxane) is a silicon-based polymer used as a lubricant and conditioning agent. (Source : EWG) Dimethicone is also known to reduce greasiness and protect the skin from moisture loss, and used often as a waterproofing ingredient in sunscreen products. However, Dimethicone is a silicone which is a substance some want to avoid them as they can be irritants for sensitive skin.

Dimethiconol is a silicon-based polymer.

DMDM hydantoin is an antimicrobial formaldehyde releaser preservative. People exposed to such formaldehyde-releasing ingredients may develop a formaldehyde allergy or an allergy to the ingredient itself and its decomposition products. In the U.S., approximately 20% of cosmetics and personal care products contain a formaldehyde-releaser and the frequency of contact allergy to these ingredients is much higher among Americans compared to studies in Europe.

Hydroxyapatite is a mineral obtained from pearl oyster shells, salmon bones, phosphate rock, or derived synthetically. It conforms generally to the formula

Iodopropynyl butylcarbamate is used as a preservative in cosmetic formulations; it is acutely toxic by inhalation and should not be used in products that can be aerosolized or inhaled.

Lauroyl lysine is a derivative of lauric acid and lysine, a naturally occurring amino acid.

Methicone is a linear silicone-based polymer.

Mica is a type of highly brittle silicate minerals with diverse chemical composition; typically used as a colorant.

Polymethyl methacyrlate is a synthetic polymer.

Sorbitan Laurate is a monoester of lauric acid and hexitol anhydrides derived from sorbitol.

Talc is a powdered native, hydrous magnesium silicate sometimes containing a small portion of aluminum silicate. Talc can be contaminated with asbestos fibers, posing risks for respiratory toxicity and cancer. Studies by the National Toxicology Panel demonstrated that cosmetic-grade talc free of asbestos is a form of magnesium silicate that also can be toxic and carcinogenic.

Titanium dioxide is one of the most common physical UV blocker ingredient for sunscreens. Titanium Dioxide is also chemically inert, making it a crucial ingredient for sensitive skin types. Furthermore, Titanium Dioxide can be scaled down to nano-particles, making it highly unlikely to clog pores. It is often used in conjunction with other sunscreen chemicals to boost the product?s SPF value, thus reducing the risk of irritation or allergies attributed to excessive usage of chemical sunscreens. The smaller the particle size, the more unobtrusive TiO2?s application. Large particles, on the other hand, leave a whitish wash or look on the skin. (Source : Michalun) There's debate in the scientific community on the dangers of nano-particles penetrating deep into the skin, however recent studies have dismiss such claims.

Tocopheryl Acetate is made up to acetic acid and Tocopherols (Vitamin E), and a common form of Vitamin E used in cosmetics. Vitamin E is a well known anti-oxidant. Vitamin E has great moisturizing capabilities. It's great for improving dry skin and even atopic dermatitis. Vitamin E also has shown to have anti-inflammatory effects for skin irritated by sun exposure and anti-aging effects.

Triethylhexanoin is a triester of glycerin and 2-ethylhexanoic acid.

The most common skincare ingredient that you will find in almost all products. It's main function is as a solvent for ingredients.