Cake icing can be prevented from becoming sugary if a little vinegar is added to the ingredients before cooking. The same is true when making homemade candy.
Does the Short-Term Use of Continuous Glucose Monitoring Detect Favorable Effects of Vinegar Ingestion at Mealtime in Adults with Prediabetes? A Pilot Trial
Clinical trials suggest that daily vinegar ingestion improves fasting blood glucose concentrations, postprandial glucose excursions, and hemoglobin A1c levels in