Are Period Underwear Safe? Everything You Need to Know

With growing awareness of sustainable period products in the UK, if you've seen headlines about period underwear and PFAS so-called 'forever chemicals' it's understandable that you've come here with questions. The good news is that the concern is real but the story is more nuanced than alarming headlines suggest. Here's an honest, evidence-based look at period underwear safety.

What Prompted the Safety Concerns?

In 2020-2023, independent testing of some period underwear brands found PFAS (per- and polyfluoroalkyl substances) in the leak-proof layer. PFAS are a large group of synthetic chemicals used in many industries for their water and stain-resistant properties. The concern is that some PFAS don't break down in the environment or the body,  hence the term 'forever chemicals.' Studies have linked certain PFAS to health concerns including hormonal disruption.

Here's the important context: not all period underwear brands used PFAS, the detected levels in tested products were generally low, and the industry has responded by moving away from PFAS-based materials for leak-proof layers.

How to Choose Safe Period Underwear

The key is knowing what certifications to look for. These are the gold standards:

• OEKO-TEX Standard 100: Tests for over 100 harmful substances including PFAS, heavy metals, and harmful dyes. A product with this certification has been independently tested and confirmed safe.

• GOTS (Global Organic Textile Standard): The most rigorous global standard for organic textiles. Certifies the entire supply chain, from the raw fibre to the finished product.

• PFAS-free claims: Look for brands that explicitly state their products are PFAS-free and can back this up with third-party certification.

Is Bamboo Period Underwear Safer?

Bamboo viscose itself is a naturally safe, soft fibre, the same material used in baby clothing for sensitive skin. It's naturally hypoallergenic and breathable. When it comes to the leak-proof layer, what matters is which technology the brand uses. OEKO-TEX certified period underwear, regardless of the top fabric, has been tested and cleared of harmful substances.

Boody's Period & Leak Proof Underwear is made from bamboo viscose and is OEKO-TEX certified, meaning it has been independently tested for harmful substances. Boody is also GOTS certified and BCorp certified,  giving you multiple layers of accountability across the product and supply chain.

What About Vaginal Health?

The vaginal environment is naturally acidic and self-regulating. What it benefits from is breathable, non-irritating fabric next to the skin. Bamboo viscose is naturally breathable and moisture-wicking, which supports a healthy environment by reducing moisture build-up. Avoid period underwear with synthetic fibres in the top layer if you have a history of sensitivity or recurring infections.

Is Period Underwear Safe for Sensitive Skin?

For most people, yes, especially bamboo-based options. Bamboo viscose is hypoallergenic, free from harsh chemical treatments in certified products, and notably gentler than synthetic alternatives. People who react to conventional pads, often due to fragrance, plastic, or chlorine bleach, frequently find period underwear a much more comfortable and non-reactive option.

 

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Frequently Asked Questions

What chemicals are in period underwear?

In OEKO-TEX and GOTS certified period underwear, there are no harmful chemicals. Uncertified products may vary. Always check for third-party certification.

How do I know if my period underwear is safe?

You can find out if your period underwear is safe by looking for the OEKO-TEX Standard 100 certification. This is an independent, globally recognised test that screens for over 100 harmful substances.

Are bamboo period underwear safe?

Bamboo viscose as a fibre is safe and natural. The complete product's safety depends on the full construction and certifications. Boody's bamboo period underwear is OEKO-TEX certified, independently verified as free from harmful substances.

Are there any health concerns with period underwear?

Some brands have found health concerns around containing PFAS ("forever chemicals") in their leak-proof layers, linked to hormonal disruption and other health risks. Not all period underwear is made the same way. Boody's is OEKO-TEX certified and independently verified to be free from PFAS and harmful chemicals. Look for that certification before you buy.