A research team has successfully engineered yeast cell factories to selectively secrete and produce vitamin A (retinoids), achieving record yields of retinol, retinal, and retinoic acid.

Researchers at the Icahn School of Medicine at Mount Sinai and their collaborators have developed a new technology to track beneficial bacteria after fecal microbiota transplants (FMT). The approach provides a detailed view of how donor microbes take hold and persist in the patients’ gut—not only which bacteria successfully colonized but how they change over time. These insights may guide the design of safer and more effective microbiome-based therapies. The study was published in the October 22 online issue of Nature Microbiology [DOI: https://doi.org/10.1038/s41564-025-02164-8].

People living, working and visiting London, UK have seen substantial reductions in air pollution following the introduction of the Ultra Low Emissions Zone (ULEZ) introduced in 2019, according to a new research paper published in a study published in npj Clean Air today (Weds 22 October).