Wait, What Is in a Tampon?

New state law requires manufacturers to list menstrual product ingredients, but it’s unclear exactly what will be included

Dana G Smith
Elemental

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A tampon on a blue backboard.
Photo: alexat25/iStock/Getty Images Plus

InIn October, New York passed the first law in the United States mandating that tampons and other menstrual products include a detailed ingredient list so consumers can be better educated about what they’re putting in their bodies.

“We have ingredient disclosure for everything, but not for this,” says Linda Rosenthal, the New York assembly member who sponsored the bill. “[It’s] ridiculous that we use these products, put them inside our bodies, and we don’t even know what’s in them.”

The main ingredient in a tampon is either cotton, viscose rayon (a fiber made from processed wood pulp), or a combination of the two. The Food and Drug Administration (FDA), which regulates tampons like a medical device, considers both materials safe. But some researchers say those ingredients don’t tell the whole story, and that tampons could be exposing women to dangerous toxins present in the absorbent fibers. How big of a risk those chemicals actually pose — and whether they’ll be covered in the new law — is still up for debate, and there’s scant research studying the connection between toxin exposure in tampons and health problems down the line.

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Dana G Smith
Elemental

Health and science writer • PhD in 🧠 • Words in Scientific American, STAT, The Atlantic, The Guardian • Award-winning Covid-19 coverage for Elemental