Best lunch for a diabetic - salad with vinegar and oil dressing. I like Greek salad with shrimp or chicken, it's filling and really lowers my blood sugar because of the vinegar. Research has shown eating a salad with vinegar and oil dressing like Balsamic, or any with vinegar, will lower glycemic loead of the whole meal by up to 33%. The Greek salad lowers my blood sugar around 100 points, about the same as a full dose/injection of Byetta. If your blood sugar gets high and you need to eat, try this!