What Are Tampons Made From? | The Fiber Facts You Need

In the U.S., tampons FDA-cleared for sale are made from cotton, rayon, or a blend of both.

For the full breakdown, see our best 100% Organic Tampons guide.

If you have ever wondered what tampons are made from, the short answer is plant-based fibers. The FDA, which regulates tampons as medical devices, confirms that the absorbent core is crafted from cotton, rayon, or a mix of the two. This straightforward composition is the result of decades of safety review and manufacturing upgrades designed to keep you healthy during your period.

There is also a common worry about chemicals like dioxin. The modern bleaching process used for these absorbent fibers eliminates elemental chlorine, keeping dioxin levels negligible. Here is a closer look at the materials, the safety science, and how to choose the right product for your body.

The Two Building Blocks: Cotton And Rayon

Every FDA-cleared tampon relies on the same absorbent fundamentals, though the exact ratio of these fibers varies by brand.

• Cotton: A natural fiber prized for its softness and absorbency.
• Rayon: A semi-synthetic fiber made from wood pulp. It is highly absorbent, which allows for slimmer tampon designs.
• The Blend: Most mainstream tampons combine both materials to balance comfort, absorbency, and cost.

While the FDA confirms these three broad categories, it does not mandate that brands list every ingredient on the package. This means the exact ratio of cotton to rayon is a proprietary formula, and formulations can shift between product lines.

The Bleaching Process And The Dioxin Question

The bleaching process used on these fibers is designed to prevent dangerous levels of dioxin from forming. The FDA states that the absorbent fibers in tampons sold today are made with a chlorine-free bleaching process. This is a significant shift from older manufacturing methods that relied on elemental chlorine.

For context, dioxin is an environmental pollutant that has been linked to health issues in high doses. The switch to chlorine-free bleaching has drastically reduced the trace amounts found in products. You may have read alarming headlines about this topic, but the FDA’s current position is that these trace levels are not a health concern.

Safety, Regulation, And What The Research Says

Because tampons are classified as medical devices, they must go through FDA review before they can be legally sold in the U.S. The FDA’s available evidence supports tampons as a safe option for managing menstrual flow, and

The regulatory umbrella covers only single-use products. The FDA has not authorized any reusable tampons, and no tampon should ever be used more than once.

When you are ready to pick a new box, you might want a product that skips the blend entirely.