Most lipsticks contain trace amounts of toxic substances, including heavy metals like lead and cadmium, but the dose from normal daily use falls well below levels considered dangerous for adults. That said, “not immediately harmful” and “completely safe” aren’t the same thing. The concern with lipstick isn’t acute poisoning. It’s the slow accumulation of low-level contaminants you’re applying to your mouth, sometimes multiple times a day, for decades.
Heavy Metals in Lipstick
Lead is the heavy metal that gets the most attention in lipstick, but it’s far from the only one. Independent testing has found cadmium, chromium, and manganese in lip products, sometimes at levels that exceed regulatory limits. In one study published in Heliyon, cadmium concentrations in most tested lipstick samples surpassed the FDA’s acceptable limit of 3 mg/kg, with some samples reaching 32 mg/kg. Chromium levels ranged up to 2,554 mg/kg in the worst cases, far above the 1 mg/kg safety threshold.
Each of these metals does different things to the body over time. Lead disrupts the endocrine system and can damage the kidneys. Cadmium builds up in organs and is linked to bone weakening and kidney damage. Chromium at high levels irritates the skin and, with prolonged exposure, raises cancer risk. Manganese is a nutrient your body needs in tiny amounts, but excessive exposure can harm the nervous system. For heavy lipstick users, the calculated risk of overexposure to both cadmium and manganese was thousands of percent above recommended intake levels in lab analyses.
However, a risk assessment focused specifically on lead found that lifetime cancer risk from lipstick use was roughly 1.5 × 10⁻⁹, a number far below the accepted safety threshold of 1 × 10⁻⁵. In plain terms, lead from lipstick alone is unlikely to cause measurable harm. The picture is less reassuring for cadmium and chromium, especially in cheaper or poorly regulated products where contamination levels tend to be higher.
Chemical Additives: Parabens and Phthalates
Beyond metals, lipsticks can contain preservatives and plasticizers that interact with your hormones. Parabens, used to prevent bacterial growth in cosmetics, have demonstrated weak estrogen-mimicking and anti-androgen activity in lab and animal studies. Phthalates, used in scented cosmetics and some lip products, show similar hormonal effects. Both can act as mild endocrine disruptors, meaning they interfere with how your body produces and responds to hormones like estrogen and testosterone.
The real-world impact on humans is still not fully understood. The hormonal effects observed in lab settings involve higher concentrations than what a single lipstick application delivers. But cosmetics aren’t the only source of these chemicals in your life. You encounter parabens and phthalates through skincare, shampoo, food packaging, and household products. The concern is cumulative exposure from all sources combined, not lipstick in isolation. A study from the HERMOSA project found that when adolescent girls switched to products free of these chemicals, measurable levels of the compounds in their bodies dropped within just three days.
PFAS: The “Forever Chemicals”
Researchers at the University of Notre Dame tested 231 personal care products and found that 50% to 60% of foundation, mascara, and lip products contained high levels of fluorine, a marker for PFAS chemicals. These synthetic compounds are called “forever chemicals” because they don’t break down in the environment or in your body. The FDA has identified over 50 PFAS ingredients intentionally added to roughly 1,700 personal care products.
PFAS are linked to immune system suppression, thyroid disruption, and increased risk of certain cancers. Long-lasting and transfer-proof lip products are especially likely to contain them, since PFAS help create that water-resistant, stay-all-day finish. There’s no required labeling for PFAS in cosmetics in the U.S., so you can’t always tell from the ingredient list whether your lipstick contains them.
Titanium Dioxide Under Scrutiny
Titanium dioxide is a white pigment used in many lipstick shades and tinted lip balms. It also provides UV protection. In May 2024, the European Commission’s Scientific Committee on Consumer Safety concluded that the available evidence was not sufficient to rule out that titanium dioxide, in both nano and standard particle sizes, could damage DNA when used in products applied near or inside the mouth. The committee flagged that many pigment-grade titanium dioxide formulations contain a significant proportion of nanoparticles, sometimes over 50%, and called for more research on how these particles interact with the delicate tissue lining the mouth.
This doesn’t mean titanium dioxide is confirmed to be harmful. It means the safety committee couldn’t confirm it was safe for oral-area products with the data currently available, which is an important distinction for a substance you’re regularly applying to your lips.
How Much Lipstick You Actually Swallow
The average lipstick user applies about 10 milligrams per application, roughly 2.35 times per day. That works out to about 24 milligrams of lipstick ingested or absorbed daily. Over the course of a year, that’s nearly 9 grams. Over a lifetime of use, you’re consuming a meaningful quantity of whatever is in the formula. This is what makes lipstick different from other cosmetics: it sits on a mucous membrane (which absorbs chemicals more readily than regular skin) and inevitably gets licked, eaten, and swallowed throughout the day.
Allergic Reactions and Skin Irritation
Toxicity isn’t the only concern. Lipstick is one of the more common causes of allergic contact dermatitis on the lips, a condition called contact cheilitis. A systematic review identified castor oil, benzophenone-3 (a UV filter), gallate compounds, wax, and colophony (a tree resin derivative) as the most frequent allergens in lip products. Symptoms include persistent dryness, cracking, swelling, or itching of the lips that doesn’t respond to lip balm. If your lips seem chronically irritated, your lipstick is a reasonable suspect.
U.S. vs. European Regulation
There is a dramatic gap between how the U.S. and Europe regulate cosmetics. The European Union has banned over 1,700 chemicals from personal care products. The United States has banned fewer than a dozen. The FDA does not require safety testing before a cosmetic goes to market. Companies can use virtually any ingredient that isn’t on that very short banned list.
The Modernization of Cosmetics Regulation Act (MoCRA), signed into law in 2022, gave the FDA new powers it previously lacked, including mandatory recall authority for dangerous products and required facility registration for manufacturers. Companies are now obligated to maintain records supporting the safety of their products. But MoCRA still does not require specific safety tests for individual products or ingredients before they’re sold. It’s a significant step forward from the previous hands-off approach, but it leaves safety substantiation largely in the hands of the companies making the products.
How to Reduce Your Exposure
You don’t have to stop wearing lipstick to lower your risk. A few practical steps make a real difference:
- Choose products from brands that test for heavy metals and publish those results. Some companies voluntarily follow EU standards even when selling in the U.S.
- Avoid ultra-long-wear formulas when possible, since these are the most likely to contain PFAS.
- Check for paraben-free and phthalate-free labels, which are increasingly common and have real meaning, since studies show measurable drops in these chemicals within days of switching products.
- Be cautious with very inexpensive or unbranded lipsticks, particularly those sold online from unregulated sources, as these consistently show the highest heavy metal contamination in testing.
- Reduce application frequency if you’re a heavy user. Moving from five or six applications per day to two or three meaningfully cuts your cumulative exposure to every contaminant in the formula.