Real. Vinegar helps with Blood Sugar levels (Vinegar Improves Insulin Sensitivity to a High-Carbohydrate Meal in Subjects With Insulin Resistance or Type 2 Diabetes).
These data indicate that vinegar can significantly improve postprandial insulin sensitivity in insulin-resistant subjects.
The type of Vinegar used was Apple Cider Vinegar. The upper curve is the control. The lower slide is on Apple Cider Vinegar.