Ten Herbs To Lower Blood Sugar Naturally. 1. Cinnamon – As little as half a teaspoon a day can help improve your insulin sensitivity and control of blood sugar. If you don’t enjoy sprinkling cinnamon in your daily yogurt or oatmeal, you can easily find capsules of cinnamon to make a cinnamon regimen easier. 2. Sage – In one German study, blood sugar levels were reduced when sage infusions were consumed by diabetics on an empty stomach. Sage is one of many powerful herbs.