Federal authorities and lawmakers are cracking down on synthetic concentrates of kratom, an herbal product sold legally over the counter in most states, as concerns rise over their risk to public health. The Drug Enforcement Administration (DEA) signaled heightened concerns about kratom-derived extracts earlier this year when it announced plans to temporarily ban products containing concentrations...
Nature, Published online: 09 October 2026; doi:10.1038/d41586-026-03159-zResults could help researchers to develop painkillers that are safer and more effective than existing treatments.