Several categories of makeup ingredients carry well-documented health concerns, ranging from hormone disruptors to potential carcinogens. The tricky part is that many of these chemicals hide behind unfamiliar names on ingredient labels. Here’s what to look for and why it matters.
Parabens
Parabens are preservatives added to makeup to prevent bacterial growth and extend shelf life. They show up on labels as methylparaben, ethylparaben, propylparaben, and butylparaben. The concern is that parabens have endocrine-disrupting qualities, meaning they can interfere with your body’s hormone signaling. Growing evidence links paraben exposure to breast cancer risk, and environmental release of parabens from cosmetic manufacturing has been tied to developmental and reproductive toxicity.
These preservatives are common in foundations, concealers, and cream-based products. If avoiding them is a priority, look for “paraben-free” labeling, but always verify by scanning the full ingredient list.
Phthalates
Phthalates mimic estrogen in the body, binding to hormone receptors and disrupting reproductive development, thyroid function, and metabolic regulation. They can also alter gene expression patterns. Roughly 10% of the population is estimated to experience developmental or reproductive effects linked to phthalate exposure.
In makeup, phthalates are most commonly found in nail polish (listed as dibutyl phthalate or DBP) and in fragranced products. The problem is that phthalates often don’t appear on labels individually because they’re bundled under the term “fragrance,” which brings us to another major concern.
The “Fragrance” Catch-All
When you see “fragrance” or “parfum” on a makeup label, you’re looking at a single word that can represent dozens or even hundreds of individual chemical ingredients. Fragrance formulas are considered trade secrets under U.S. law, so companies aren’t required to disclose what’s actually in them. The FDA acknowledges that fragrance components are the cosmetic ingredients most likely to be trade secrets, and that some of those components have the potential to cause allergic reactions or sensitivities.
This means phthalates, synthetic musks, and other irritants can all sit inside that one vague term. If you have sensitive skin or want full transparency about what you’re applying, products labeled “fragrance-free” (not “unscented,” which can still contain masking fragrances) are a safer bet.
Formaldehyde-Releasing Preservatives
Formaldehyde itself is rarely added directly to cosmetics anymore, but a whole family of preservatives slowly release formaldehyde when mixed with water. These are widespread in foundations, powders, and cream products. The names to watch for on labels include:
- DMDM hydantoin
- Quaternium-15
- Diazolidinyl urea
- Imidazolidinyl urea
- Bronopol (2-bromo-2-nitropropane-1,3-diol)
- Sodium hydroxymethylglycinate
These ingredients are among the top cosmetic allergens identified by the FDA, frequently causing contact dermatitis. Even in small concentrations (most are allowed at 0.1% to 0.6% in finished products in the EU), the cumulative exposure from using multiple products daily adds up.
Heavy Metals in Pigments
Lead, arsenic, cadmium, mercury, chromium, cobalt, and nickel can all show up in makeup, particularly in pigmented products like lipstick, eyeshadow, and blush. These metals aren’t typically added on purpose. They’re natural contaminants in the mineral pigments and colorants used to create makeup shades.
The FDA recommends a maximum of 10 parts per million (ppm) for lead as an impurity in cosmetic lip products and externally applied cosmetics. For color additives specifically, the limits are 3 ppm for arsenic, 20 ppm for lead, and 1 ppm for mercury. Nickel is a particularly common allergen in cosmetics and is one of the top causes of contact dermatitis from makeup use. Deeper, more saturated pigments in budget products tend to carry higher contamination risk because of less refined raw materials.
PFAS (Forever Chemicals)
Per- and polyfluoroalkyl substances are added to makeup to create water resistance, long wear, and a smooth, spreadable texture. They’re called “forever chemicals” because they don’t break down in the environment or in your body. The FDA confirms that PFAS are intentionally added to lipsticks, eyeshadows, moisturizers, nail polish, blushers, and cleansers.
On ingredient labels, PFAS appear under names like polytetrafluoroethylene (PTFE), perfluorononyl dimethicone, perfluorohexylethyl triethoxysilane, and methyl perfluorobutyl ether. Any ingredient with “perfluoro” or “PTFE” in the name is a PFAS compound. Waterproof and long-wear formulas are the most common places to find them.
Talc
Talc is a mineral used in powders, eyeshadows, blushes, and foundations to absorb moisture and create a silky finish. The concern isn’t talc itself but rather asbestos, a known carcinogen that occurs naturally alongside talc deposits and can contaminate the final product. Scientific literature going back to the 1960s has also suggested a possible link between talc powder used in the genital area and ovarian cancer, though studies have not conclusively demonstrated this connection.
In late 2024, the FDA proposed a rule that would require standardized testing methods to detect asbestos in talc-containing cosmetics. Until that rule is finalized and enforced, the testing remains voluntary. If you’d rather not take the chance, cornstarch-based or synthetic alternatives are widely available in setting powders and pressed powders.
Certain Cyclic Silicones
Cyclic silicones, specifically D4 (cyclotetrasiloxane), D5 (cyclopentasiloxane), and D6 (cyclohexasiloxane), are used in primers, foundations, and cream products to give them that characteristic silky, smooth feel. The EPA has preliminarily determined that D4 presents unreasonable risk to both human health and the environment. It bioaccumulates in aquatic ecosystems, and workers with high exposure face the greatest health risks. The EU has already restricted D4 and D5 in rinse-off cosmetics at concentrations above 0.1%.
For everyday consumers, the exposure from a single product is low, but these silicones appear in so many products that combined daily exposure can become meaningful. Look for “cyclomethicone” or any ingredient ending in “-siloxane” on labels.
Common Allergens to Know
Beyond the ingredients above, five classes of cosmetic allergens cause the majority of allergic reactions from makeup. According to the FDA, these are natural rubber (latex), fragrances, preservatives (especially the formaldehyde releasers and isothiazolinones like methylisothiazolinone and methylchloroisothiazolinone), dyes (particularly p-phenylenediamine, or PPD, and coal tar), and metals (nickel and gold).
If you’ve ever had redness, itching, or a rash from a makeup product, one of these five categories is the most likely culprit. Patch testing with a dermatologist can identify your specific triggers, which makes label reading far more targeted and effective.
Why U.S. Labels Require Extra Scrutiny
The European Union has banned over 1,700 chemicals from personal care products. The United States has banned fewer than a dozen. This enormous gap means that products sold in the U.S. can legally contain ingredients that are prohibited across Europe, Canada, and other markets. Until recently, the FDA didn’t even require companies to register their facilities or report adverse events.
The Modernization of Cosmetics Regulation Act (MoCRA), signed in 2022, changed some of this. Companies must now report serious adverse events to the FDA within 15 business days, register manufacturing facilities, list each product and its ingredients with the FDA, and maintain records supporting the safety of their products. This is meaningful progress, but the U.S. still does not require pre-market safety testing for cosmetics. The responsibility for choosing safer products still falls largely on you as a consumer.
Reading Labels Effectively
Cosmetic ingredient labels use the International Nomenclature of Cosmetic Ingredients (INCI) system, which is why names look so unfamiliar. Ingredients are listed in descending order of concentration, so anything in the first third of the list is present in significant amounts. Here are quick scanning shortcuts:
- Anything ending in “-paraben” is a paraben preservative.
- “Fragrance” or “parfum” may hide dozens of undisclosed chemicals.
- “DMDM,” “quaternium,” or “urea” in a preservative context signals a formaldehyde releaser.
- “Perfluoro-” or “PTFE” indicates a PFAS compound.
- “-siloxane” or “cyclomethicone” points to cyclic silicones.
- “CI” followed by a number is a color index designation for a dye or pigment, which may contain trace heavy metals.
Apps like INCI Decoder, Think Dirty, and EWG’s Skin Deep database let you scan barcodes or search ingredient lists for quick safety ratings. They aren’t perfect, but they make the process faster than memorizing chemical names. The most effective approach is knowing your personal triggers and the handful of ingredient categories above, then checking for those specifically rather than trying to evaluate every line on the label.