The American journal of clinical nutrition
Audio Summaries

Interpreting ultra-processed food trial evidence: evidentiary limits, reporting practices, and policy relevance

Jun 10, 2026

The authors examine the interpretation of randomized controlled trials comparing ultra-processed foods (UPF) to minimally processed diets, questioning whether the evidence truly supports causal claims about the health impacts of UPF. They highlight methodological limitations and biases in reporting that may overstate the negative effects of UPF while downplaying neutral or positive outcomes. The paper concludes with recommendations for improving trial design and reporting to ensure more accurate interpretations that inform public health policy.

Circulating palmitoleic acid is associated with cerebral glucose metabolism in healthy middle-aged individuals: results from the PESA prospective cohort study

Jun 10, 2026

The authors aimed to investigate the relationship between circulating palmitoleic acid (POA), a biomarker of de novo lipogenesis, and cerebral glucose metabolism in healthy middle-aged individuals. Their findings revealed that higher levels of RBC POA were associated with lower cerebral glucose uptake both cross-sectionally and longitudinally, suggesting that dietary habits influencing POA levels may play a crucial role in maintaining brain health and preventing cognitive decline.

Enteral Iron Dose Effect on Iron Storage, Intestinal Barrier, and Gut Microbiome in Preterm Infants: A Randomized Clinical Trial

Jun 9, 2026

The authors aimed to compare the effects of two different enteral iron doses (2 mg/kg/day vs. 6 mg/kg/day) on gut health in very-low-birth-weight preterm infants, specifically investigating concerns about potential harms to the gut microbiome and intestinal barrier function. The study found that the higher iron dose improved iron status and did not negatively impact the gut microbiome, suggesting that concerns about gut microbiome disruption do not justify lower iron dosing in this population.