‘Forever chemicals’ detected in dolphin milk
A Texas A&M study revealed ‘forever chemicals’ (PFAS) in archived dolphin milk, showing transfer from mothers to nursing calves. This early life exposure raises significant concerns for marine mammal health and broader global environmental well-being. Researchers used an advanced analytical technique to detect a wider range of PFAS, finding concentrations that, when scaled to human health benchmarks, could be concerning. The findings highlight dolphins as crucial sentinels for widespread contamination.
A recent study from the Texas A&M Superfund Research Center, in collaboration with the University of North Carolina at Chapel Hill and the Smithsonian, uncovered the presence of perfluoroalkyl and polyfluoroalkyl substances (PFAS), known as ‘forever chemicals,’ in dolphin milk samples collected between 1991 and 1993. The research confirms that mother dolphins transfer these persistent contaminants to their nursing calves, underscoring the risk of early life exposure in marine mammals. Scientists like Dr. Weihsueh Chiu emphasize that dolphins serve as environmental sentinels, reflecting broader global contamination issues that could eventually impact other wildlife and humans. PFAS are widely used in industrial and household products, persist in the environment, and accumulate in living organisms, raising concerns about immunotoxicity and effects on growth, development, hormone function, and liver health. The study employed a novel multidimensional analytical technique, developed by Dr. Erin Baker's team, combining liquid chromatography, ion mobility spectrometry, and mass spectrometry. This advanced method allowed for the detection of a much broader spectrum of PFAS compounds than traditional tests. By scaling the detected PFAS levels against human health benchmarks, researchers identified concentrations that warrant concern. These findings reinforce the urgent need to understand the spread and impact of global PFAS contamination on both marine ecosystems and human health.
