Is Old-School Kohl Safer Than Modern Eyeliner? Don't Believe the Hype

The Myth of 'Natural' Kohl

Every time I see a beauty influencer praising "ancient kohl" as a clean, natural eyeliner, I cringe. It's a romantic fantasy that's not just wrong—it's potentially dangerous. Yes, kohl has an incredible history, but the stuff dug up from tombs and still sold in some traditional markets is not the same as the kohl pencil you pick up at Sephora. The lead content alone should make you pause.

What Is Kohl, Really?

Kohl is the granddaddy of eyeliner, used since 3100 BC in Ancient Egypt (Cosmetics history). It was made from galena, a lead sulfide mineral, often mixed with antimony and oils (Britannica kohl). For centuries, it held cultural and religious significance—think of the thickly lined eyes representing the restored eye of the god Horus. Even today, many Muslims consider a version called ithmid as Sunnah (Britannica kohl). But here's the kicker: modern science has confirmed that traditional kohl often contains lead and antimony, both toxic. Studies have found elevated blood lead levels in children who used it (Britannica kohl). The FDA won't approve kohl for cosmetic use in the US because of these heavy metals (FDA Eye Cosmetic Safety). So when a brand slaps "kohl" on a pencil, it's usually just a marketing nod to the pigment's color and texture—it's not the real thing.

The Modern Eyeliner Landscape

Today, we have five main types of eyeliner: pencil, kohl, gel, cream, and liquid (Cosmetics history). Each has its pros and cons. Liquid is best for sharp cat-eyes; kohl is best for smoky looks. But the pigments in modern eyeliners are strictly regulated. For instance, iron oxide (black), ultramarine (blue), and chromium oxide (green) are common, and even a color like D&C Black No. 2 must pass FDA batch certification (FDA Eye Cosmetic Safety). These aren't natural pigments dug from the earth—they're engineered for safety and performance. The global eye makeup market is booming, projected to hit $23.7 billion by 2030, with mascara alone expected to reach $6.5 billion (GII Eye Makeup Market Report). Clearly, we love our eye makeup, but we need to be smart about it.

Why 'Natural' Isn't Always Safer

The lure of "natural" cosmetics is powerful. But here's the truth: labels like "natural" and "hypoallergenic" have no official meaning (MedlinePlus Cosmetics). Companies can use them however they want. And as the kohl example shows, natural can be dangerous. The EU has even restricted microplastics in cosmetics because they persist in the environment (EU Environment microplastics). But microplastics are a different issue than lead poisoning. The point is, we need to look beyond the marketing and focus on what's actually in the product. A synthetic pigment that's been tested for safety is often a better choice than a "natural" one that might be contaminated.

Hygiene Rules You Can't Ignore

Even if you choose the safest eyeliner, you can still end up with an eye infection if you're not careful. I'm talking about styes—those painful bumps on your eyelid caused by infected oil glands. The culprit? Often, bacteria like Staphylococcus aureus, which can clog the glands (Duke Eye Center). Poor hygiene, like rubbing your eyes with unwashed hands or sharing makeup, is a major cause. And don't even think about applying eyeliner in a moving car—a sudden bump can scratch your cornea with the applicator (FDA Eye Cosmetic Safety).

The FDA recommends replacing mascara every 2-4 months (FDA Eye Cosmetic Safety). The American Optometric Association says to replace eye makeup every three months (AOA Hordeolum). And a 2026 study found that used eye cosmetics can harbor Bacillus and staphylococci, emphasizing the need for regular replacement (Microorganisms study). So, how long do you keep that eyeliner? If you can't remember when you bought it, toss it.

What I'd Actually Do

Here's my no-nonsense advice: skip the "kohl" trend and go for a well-formulated, ophthalmologist-tested eyeliner from a reputable brand. Look for terms like "ophthalmologist-tested" and avoid anything that claims to be "natural" if it doesn't list ingredients. And please, don't share your makeup or testers in stores—that's a recipe for pink eye.

If you want a smoky eye, use a kohl-style pencil that's been lab-tested for safety, but don't chase the ancient formula. The Egyptians also used lead-based kohl—we know better now. And for the love of your eyes, remove your makeup before bed and keep your applicators clean. Your future self—and your peepers—will thank you.

Sources

• Cosmetics history (encyclopedia) - https://en.wikipedia.org/wiki/Cosmetics
• Britannica kohl (encyclopedia) - https://www.britannica.com/topic/kohl
• FDA Eye Cosmetic Safety - https://www.fda.gov/cosmetics/cosmetic-products/eye-cosmetic-safety
• GII Eye Makeup Market Report - https://www.giiresearch.com/report/go1780771-eye-makeup.html
• MedlinePlus Cosmetics (NIH) - https://medlineplus.gov/cosmetics.html
• Microorganisms study on used eye cosmetics (2026) - https://europepmc.org/article/MED/42197397