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Tea, tap water and child IQ: What a Canadian pregnancy study found

Researchers analyzed 485 mother-child pairs in Canada to examine whether estimated fluoride intake from tea during pregnancy was associated with IQ at ages 3 to 4. Each 0.5 mg/day increase was associated with a 2.24-point lower full-scale IQ score, although the observational design and estimated exposure prevent causal conclusions.

31 Jul 2026

Hydrogen-powered shipping could deliver $284 billion in annual health benefits

Researchers modeled how replacing conventional global shipping fuels with hydrogen could change PM2.5 and ozone pollution, premature mortality, and monetized health benefits. Under complete transition, the model estimated 129,458 fewer premature deaths and US$284 billion in annual monetized health benefits, although some regions experienced increased pollution from hydrogen production or altered ozone chemistry.

31 Jul 2026

Research identifies common neuroimmune signatures in rapid-acting antidepressants

In a new study, researchers from The University of Texas MD Anderson Cancer Center have uncovered insights that may help explain how rapid-acting antidepressants, such as ketamine and psychedelics, can reduce symptoms in difficult-to-treat depression.

30 Jul 2026

Coastal residents more likely to have worse midlife health

People who live by the coast in midlife are more likely to have worse health, finds a new study in England and Wales led by UCL researchers.

30 Jul 2026

Ten-million-person study links semaglutide to lower COVID-19 mortality

Researchers analyzing claims from more than 10.1 million commercial insurance and Medicare Advantage enrollees found that semaglutide use was associated with a 49% lower adjusted hazard of COVID-19-related death. The observational findings corroborate earlier SELECT trial results but do not establish causation, making further prospective research essential.

30 Jul 2026

Pork supply chains may be shaping the global spread of drug-resistant Salmonella

Researchers linked 129,136 global human and swine Salmonella genomes with sampling from a Guangdong pork supply chain to examine how downstream stages relate to antimicrobial resistance. The study suggests slaughterhouse and retail interfaces may concentrate S. 4,[5],12:i:- ST34, resistant strains, and mobile resistance elements, supporting broader One Health surveillance beyond farms.

30 Jul 2026

Study reveals widening inequality in leisure-time physical activity

A ten-year study of residents of the city of São Paulo, Brazil, revealed that leisure-time physical activity is highly unequal and that the gap between social strata is widening.

30 Jul 2026

Biotherapeutic metabolite repairs gut damage caused by HIV infection

Researchers at the UC Davis School of Medicine have identified a naturally occurring metabolite that repairs gut damage caused by HIV infection and significantly improves the effectiveness of antiretroviral therapy (ART) in the nonhuman primate model of HIV/AIDS.

30 Jul 2026