Tea Q&A with Dr. Saleeby
Q: My mother is a diabetic. I've heard tea is good for diabetics as long as they don't add sugar. Is this true? Do you think that by drinking tea I can avoid getting diabetes, too?
A: Green, Oolong and Black tea appear to be beneficial in reducing risk of Diabetes Mellitus type II (DM II). Dr. Richard Anderson, at the USDA's
Adding milk, nondairy or soy creamers to your tea does inhibit the insulin boosting effect. Lemon juice however did not have a negative effect on the tea. Adding simple sugars would not necessarily be a problem for a non-diabetic, but a sugar alternative such as a non-caloric commercial sweetener or a natural sugar alternative such as stevia may be healthier and recommended for the diabetic patient. The diabetes lowering effects of tea only last a few hours, therefore making it necessary to drink tea several times throughout the day to benefit from its properties. My recommendation is to drink three to four cups of tea (Camellia sinensis) a day flavored with lemon or cinnamon as opposed to sugar.
Tsuneki, H., et al, Effect of green tea on blood glucose levels and serum proteomic patterns in diabetic (db/db) mice and on glucose metabolism in healthy humans. BMC Pharmacology (2004) 4:18:10.1186/1471-2210-4-18
Greenberg, JA, et. al., Coffee, tea and diabetes: the role of weight loss and caffeine. International Journal of Obesity (2005) 29, 1121–1129.
Anderson, RA, et. al., Tea Enhances Insulin Activity. Journal of Agricultural and Food Chemistry (2002) 50(24), 7182-7186.