Ginseng is an immunity-boosting herb for ages that has been recently found to also have anti-diabetic properties. Ginseng slows down the absorption of carbohydrates and makes the cells take up and use more glucose. It also increases insulin production in the pancreas. Research conducted by the University of Toronto found that ginseng can help lower the blood glucose levels by 15 to 20% among diabetics.
Having ginseng early in the morning and before dinner is quite beneficial. You can chop 2-3 g of ginseng root and steep for 5-6 minutes in boiled water. Powdered ginseng is also available that can be drunk mixed in warm water.