Biochemist and health expert Dr. Rhonda Patrick has become increasingly concerned about the impact of microplastics and their associated chemicals on human health, particularly regarding neurodevelopment in children.
Among the most alarming findings in this emerging field of research is the connection between BPA exposure during pregnancy and autism diagnosis.
BPA, or bisphenol A, is a chemical added to plastics to improve durability, robustness, and flexibility. As Dr. Patrick explains, these chemicals are classified as endocrine disrupting chemicals because they fundamentally interfere with the body’s hormonal systems.
“BPA, BPS, these are chemicals that are often referred to as xenoestrogens because they mimic estrogen in the body and they bind to estrogen receptors,” she notes. They can also bind to androgen receptors, either blocking or enhancing their activity depending on the dose.
The implications for developing fetuses are particularly concerning. Dr. Patrick points to research showing that women with higher urinary BPA levels face dramatically elevated risks.
“Women that have higher urinary BPA levels are six times more likely to have a child diagnosed with autism,” she states. This isn’t the only neurodevelopmental concern. BPA exposure also affects ADHD risk, with boys appearing especially vulnerable to these effects.
The impact extends beyond autism and ADHD to fundamental aspects of male sexual development. Dr. Patrick explains that BPA and similar chemicals like phthalates affect the anogenital distance in developing boys and contribute to conditions like undescended testicles and hypospadias.
“It’s really common now if you talk to parents, how common it is to have a boy with an undescended testicle,” she observes.
These hormones play crucial roles during development, signaling how organs should form and determining sexual characteristics. When endocrine disruptors interfere with these signals during critical developmental windows, the consequences can be profound and lasting.
Dr. Patrick acknowledges the ethical constraints that make definitive human studies impossible. “You’re never going to have that gold standard” of a randomized controlled trial giving pregnant women BPA, she explains.
However, the combination of observational human data, animal studies showing causation, and clear biological mechanisms creates a compelling case for concern.
The ubiquity of BPA exposure makes this particularly troubling. It leaches from plastic containers into food and beverages, especially when heat is involved.
“Studies looking at BPA leeching into liquid when heat like boiling water is applied, it increases the leeching by 55 times,” Dr. Patrick warns. This means common activities like drinking coffee from plastic-lined to-go cups or heating food in plastic containers dramatically increase exposure.
For those concerned about protecting future children, Dr. Patrick recommends several practical steps: avoid heating plastic, minimize single-use plastics, use reverse osmosis water filtration, and be particularly cautious about thermal receipts and personal care products containing phthalates.
While complete avoidance is impossible in our plastic-saturated world, these measures can significantly reduce exposure during the critical window of pregnancy and early development.
