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Two-Day Oat Diet Cuts LDL Cholesterol by About 10% in Small Human Study

Researchers link the sustained effect to gut-microbiome shifts that produce phenolic metabolites.

Overview

  • In a peer-reviewed Nature Communications study from the University of Bonn, 32 adults with metabolic syndrome followed a two-day, calorie-restricted regimen of cooked oats served three times daily.
  • Participants on the oat regimen saw about a 10% drop in LDL cholesterol, along with an average two-kilogram weight loss and a slight reduction in blood pressure, with benefits persisting for up to six weeks.
  • Blood and stool analyses showed higher levels of phenolic compounds such as ferulic acid and an increase in specific bacteria including Erysipelotrichaceae UCG-003 linked to the lipid changes.
  • A separate six-week, lower-dose approach of roughly 80 grams of oats per day produced little change, indicating that short, intensive intake with calorie reduction appears critical.
  • Researchers propose testing periodic short 'oat cures' and probing the responsible microbes and metabolites, while noting the small sample size and calorie-restriction confound and cautioning this is not a substitute for medical therapy.