
To help prevent diabetes, consider what’s in your cup. Research on tea — one of the world’s oldest and most widely consumed beverages — shows some striking results.
Green Tea
One research project found that drinking six cups of green tea per day reduced the risk of diabetes by 33% compared to those who drank less than one cup per day.
Black Tea
In another study, researchers found that daily black tea consumption reduced blood sugar and insulin resistance.
Dark Tea
Researchers also found that those who drank dark tea had a 47% lower risk of diabetes compared to non-tea drinkers.
The Common Thread
What these three teas have in common is that they all come from the same plant, Camellia sinensis. The only difference between green, black, and dark tea is the degree of fermentation the leaves undergo.
To help prevent diabetes, consider incorporating green, black, or dark tea into your daily routine.
For more tips on natural health, download the free eBook Health Secrets at peacediet.org.
About Dr. Terry Shintani, MD, JD, MPH
Dr. Terry Shintani is a Harvard-trained physician and nutritionist, named a Living Treasure of Hawai’i and recipient of the U.S. Secretary of Health and Human Services Award for Excellence. He is the creator of the Peace Diet and the landmark Waianae Diet — published in the American Journal of Clinical Nutrition and cited over 137 times — and the author of 16 books on natural health and nutrition, drawing on more than 35 years of clinical practice in Honolulu, Hawaii.
Learn more about Dr. Shintani’s work and recognition: NLM Native Voices
Sources:
- NIH/PubMed — Green Tea Consumption and Type 2 Diabetes Risk: Cohort Study
- NIH/PubMed — Black Tea Intake and Insulin Resistance
- NIH/PubMed — Dark Tea Consumption and Diabetes Risk in Chinese Adults








