endocrine disruptors

A "large fraction" of groundwater samples are contaminated by perfluoroalkyl and polyfluoroalkyl substances (PFASs) and would be considered unacceptable for drinking water, a study claims. The analysis, published by Nature Geoscience, brings together data from 273 studies of surface and groundwater samples from around the world since 2004. The exact proportion of samples exceeding the thresholds varies according to the standards considered. For example, 69% of groundwater samples with no known source of contamination exceed the Canadian threshold, but the figure is only 6% if the EU criterion for the sum of all PFASs is considered.

Heavy metals - including arsenic, cadmium and mercury - may adversely affect the ovaries of women approaching menopause, a study claims. Those with high levels of metals in their urine had lower levels of anti-Müllerian hormone, indicating diminished ovarian reserve - fewer oocytes in the ovaries compared to other women of that age. The authors, whose study is published in The Journal of Clinical Endocrinology & Metabolism, used urine data from more than 500 women in the US up to 10 years before their last menstrual period.

A research team in Belgium found perfluoroalkylated and polyfluoroalkylated substances (PFAS) in drinking straws. The research, published in the journal Food Additives & Contaminants, analysed the presence of these persistent and potentially harmful compounds in 39 types of straws purchased from different shops, supermarkets or fast food chains. These substances were most prevalent in paper and bamboo straws, followed by plastic and glass straws. They were not detected in stainless steel straws.

A few weeks ago, the European Food Safety Authority (EFSA) said that exposure to bisphenol A through food is a risk to human health. The agency recommended a much lower tolerable daily intake dose than it had its own previous recommendations. In this explainer, we review key facts and documents to cover this issue--which will continue to make the headlines in months and years to come.  

US scientists have found perfluoroalkylated and polyfluoroalkylated substances (PFASs) in sewage sludge from toilet paper waste. The research, published in the journal Environmental Science & Technology Letters, analysed the presence of these persistent and potentially harmful compounds in toilet paper rolls sold in North, South and Central America, Africa and Western Europe. These substances were compared with those detected in samples of sewage sludge from sewage treatment plants in the United States.

A study in Spanish children, with follow-up from pregnancy to adolescence, has found an association between children's exposure to pesticides and fungicides and earlier breast development in girls and genital development in boys. The work has been carried out by the University of Granada (UGR), the Institute for Biosanitary Research (ibs.GRANADA) and CIBERESP (ISCIII).

Researchers have analysed the presence of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in 72 textile products purchased online in the US and Canada in 2020 and 2021. The results, published in the journal Environmental Science and Technology Letters, show high concentrations in school uniforms and higher concentrations in 100 % cotton as opposed to synthetics. 
 

Analysis of 45 commonly used chemicals in more than 1,000 pregnant women in six countries, including Spain, finds a link between increased exposure to these compounds and non-alcoholic fatty liver disease in children, according to research published in JAMA Network Open. It is the first comprehensive study of prenatal exposure to these chemicals in combination, as they occur in real life.