Last updated March 2026
Most people don't think twice about what's in their lash glue. You buy it, you apply it inches from your eyeballs, and you move on. But if you've ever ended up with red, swollen eyes after a lash application — or noticed your natural lashes getting thinner over time — the adhesive is likely the culprit.
The beauty industry has a transparency problem when it comes to lash adhesives. Here's what the research actually says.
Allergic Reactions and Cancer Risk
The most common chemicals in conventional lash glues — formaldehyde, benzene, and cyanoacrylate — aren't just irritants. Research published in the International Journal of Environmental Research and Public Health classifies formaldehyde and benzene as known carcinogens, with long-term exposure linked to cancer risk. Cyanoacrylate specifically has been tied to corneal abrasions, chronic eye infections, and lasting vision complications. These aren't rare edge cases — they're documented outcomes of products that are still widely sold.
Eye Irritation and Inflammation
Even without a full allergic reaction, toxic lash adhesives cause ongoing low-grade irritation. The American Academy of Ophthalmology has flagged that repeated exposure to common adhesive chemicals leads to redness, chronic watering, and inflammation — symptoms that many people mistake for sensitivity or dry eyes. Left unaddressed, that irritation can progress into more serious eye conditions.
Damage to Your Natural Lashes
One of the most frustrating long-term effects: the extensions meant to make your lashes look better end up destroying them. A study in the Journal of Cosmetic Dermatology found that harsh adhesive chemicals weaken the lash follicle over time, leading to thinning, breakage, and in some cases permanent loss. The irony is brutal.
There is a better option. True Glue is the world's first all-natural lash adhesive — built on a botanical base with zero formaldehyde, zero cyanoacrylate, and zero synthetic fillers. It's what we created because we couldn't find anything on the market we'd actually feel good putting near our eyes. Try the Original →
Vision Impairment
The eye is one of the most chemically sensitive areas of the body. A report from the American Academy of Ophthalmology warns that contaminated or improperly formulated products can cause corneal abrasions and, in serious cases, permanent vision loss. This isn't about misuse — it's about what's in the product itself.
Increased Sensitivity Over Time
Here's something most brands won't tell you: the more you use a toxic adhesive, the worse your reactions get. A National Institutes of Health longitudinal study found that frequent lash extension users developed progressively heightened sensitivity to adhesive ingredients — meaning each exposure hits harder than the last. Your body isn't overreacting. It's trying to protect you.
The risks of toxic lash glues are real, well-documented, and largely preventable. Knowing what's in your adhesive — and what's not — is the simplest thing you can do to protect your eyes, your lashes, and your long-term health.
Want to know exactly what goes into a cleaner formula? See how our ingredients compare →
