Vinegar ingestion at bedtime moderates waking glucose concentrations in adults with wellcontrolled type 2 diabetes

Given the importance of maintaining acceptable blood glucose concentrations, there is much interest in identifying foods and diet patterns that will help individuals with diabetes manage their condition. Based on previous data indicating that vinegar ingestion at mealtime reduces postprandial glycemia (1–4), the aim of this pilot study was to examine whether vinegar ingestion at bedtime reduces the next-morning fasting glucose concentration in individuals with type 2 diabetes. RESEARCH DESIGN AND METHODS— Four men and seven women (aged 40–72 years) diagnosed with type 2 diabetes (by a physician) who were not taking insulin completed the study. Participants provided a clinically determined A1C reading from a recent (<2 months) blood analysis. All participants gave written informed consent, and the study was approved by the institutional review board at Arizona State University. Participants maintained 24-h diet records for 3 days and measured fasting glucose at 0700 h for 3 consecutive days with a calibrated glucometer before the start of the study. Participants were instructed to continue usual prescription medication use during the study