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PAAs in colored paper napkins

Scientists analyze primary aromatic amines in colored paper napkins from Europe; find sum PAA concentrations exceeding 10 µg/L limit, carcinogenic PAAs exceeding 2 µg/L limit; red, orange, yellow, and multi-colored napkins with highest load

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Mapping microplastics in the male reproductive system

Study provides an in-depth look at microplastics in the male reproductive system, analyzes human and mouse samples to chart concentrations and polymer types; finds microplastics in all human testes samples and majority of semen samples; larger plastic particles may get trapped in testis, leading to higher concentrations; identifies correlation between urbanization, home-cooked meals, and body scrub used to microplastics concentration

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Researchers detect microplastics in human semen and heart

Four recent studies assess microplastics: in human semen, heart, from baby food containers, and suitability of in vitro models to investigate human health effects; find microplastics in six out of ten semen samples, find impacts on semen quality; samples from cardiac surgery patients contain microplastics in heart and surrounding tissue; billions of nano- and microplastics released from plastic baby food containers; outline challenges and recommendation of studying plastic particles in vitro

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Opinion: Walgreens should pull toxic products

Petition calls upon US drugstore chain to remove toxic chemicals from products, member of Montana Conservation Voters criticizes lacking chemicals policy

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Chemical metabolism in young and elderly

Scientists review studies demonstrating differences in drug pharmacokinetics between young and elderly people, recommend use of varying uncertainty factors for acceptable daily exposure calculations due to sensitivity differences