A new study warns that a chemical commonly found in everyday household items and clothing, perfluorodecanoic acid (PFDA), a type of 'forever chemical', could significantly disrupt facial development in unborn babies. Scientists at the University of Colorado Anschutz Medical Campus in the US conducted research that demonstrated even tiny amounts of PFDA could increase the risk of small eyes, jaw problems, and other facial abnormalities by approximately 10 percent. The study, published in Chemical Research in Toxicology, identified PFDA as the most harmful among 139 tested PFAS chemicals, providing the first clear explanation of its impact on developing foetal faces.

Valentina Milanova, a gynaecological expert and founder of Daye, highlighted the significance of the findings, explaining that PFDA delivers a 'double hit' to the body. It simultaneously blocks a key enzyme (CYP26A1) responsible for clearing excess retinoic acid and suppresses the genes that produce this same enzyme, effectively disabling two lines of the body's defence mechanisms. Dr. Deborah Lee, a sexual and reproductive health specialist at Dr Fox Online Pharmacy, further clarified that PFDA belongs to the wider family of perfluoroalkyl substances (PFAS), which are called 'forever chemicals' due to their extreme resistance to breakdown, allowing them to persist in water, soil, and the human body for decades.

PFDA primarily interferes with retinoic acid, also known as vitamin A, a natural chemical crucial for shaping a baby's face in early pregnancy. By blocking the CYP26A1 enzyme and reducing its production, PFDA leads to unnaturally high levels of retinoic acid. Dr. Lee emphasized that such elevated levels can result in craniofacial abnormalities, including underdeveloped eyes and abnormal jaw formation. Ms. Milanova added that retinoic acid controls hundreds of genes vital for forming the baby’s face, eyes, and nervous system, and both too much and too little of it can be equally detrimental. Craniofacial development is most critical during the first trimester, particularly between weeks four and ten of pregnancy when the face, jaw, and eyes are forming, making this period the highest-risk window for chemical disruption.

Exposure to PFDA and other PFAS is widespread. These chemicals are found in numerous products such as non-stick cookware, water- and stain-resistant clothing, carpets, plastic food packaging and storage containers, ski wax, grease-resistant food packaging, stain-resistant furniture, waterproof cosmetics, and even some menstrual products, including those labelled organic or natural. These chemicals can leach from products, accumulate in household dust, and lead to low-level exposure through breathing or swallowing, especially for children. Alarmingly, PFDA has a biological half-life of around 12 years, meaning exposure can accumulate long before pregnancy begins.

To mitigate exposure, Dr. Lee recommends several practical steps: prioritizing fresh over processed food, avoiding plastic packaging and storage containers, limiting new household items, and filtering tap water. She also advises against microwaving food in plastic, washing food thoroughly to remove pesticides, and minimizing exposure to cleaning products or disinfectants containing PFAS. While acknowledging that factors like smoking, alcohol, and certain medications remain far more harmful, Dr. Lee stresses that avoiding PFAS is an important additional precaution, aligning with guidance from the Royal College of Obstetricians and Gynaecologists. Professor of Endocrinology, Annice Mukherjee, added a cautious note, stating that while the in vitro study raises significant concerns, further research is definitely required to confirm if these findings can be extrapolated to humans. The study's insights could ultimately assist regulators and manufacturers in identifying the most dangerous PFAS chemicals, developing safer alternatives, and reducing exposure for vulnerable groups, thereby making everyday products safer for families and children.