Are microplastics driving autoimmune diseases like lupus and thyroid?

What's actually in it

Microplastics are tiny pieces of plastic that end up in our bodies through the food we eat and the air we breathe. These particles are not just inert bits of trash. They act as carriers for other harmful chemicals and can trigger inflammation in the body.

Beyond the plastics themselves, common household items often contain Bisphenol A (BPA) and its chemical cousins. These are known endocrine disruptors, meaning they mess with your hormones. When your hormones are out of balance, your immune system can start to struggle, which is a major factor in autoimmune conditions.

What the research says

A 2026 study in Environ Geochem Health confirms that microplastics act as environmental triggers for autoimmune diseases. These particles can cause immune system confusion, which is a hallmark of conditions like lupus.

Thyroid health is also under attack. A 2026 study in iScience found that BPA and similar chemicals are directly linked to thyroid dysfunction, autoimmunity, and even cancer. These chemicals disrupt the way your thyroid functions, making it harder for your body to regulate itself.

The problem is systemic. A 2026 study in Autoimmun Rev highlights how various environmental toxins and metals contribute to immune system breakdown. This peer-reviewed research shows that these exposures affect people differently based on sex and hormonal status, but the underlying risk remains high for everyone exposed to these common pollutants.