Green Tea
Catechin antioxidants, caffeine for alertness.
- Category
- Drinks
- Plate rating
- 90/100
- Glycemic index
- ≈0 (no carbs)
Medicine note: Caffeine and medicines
Some medicines make caffeine's effects stronger. Read more.
What green tea offers
- Catechin antioxidants
- Caffeine for alertness
When to eat it
Morning or afternoon.
Tip
Unsweetened is best
Blood sugar
Contains little or no carbohydrate, so it has almost no direct effect on blood sugar. GI values are approximate and vary with ripeness, variety and preparation. If you manage diabetes, ask your care team how this food fits your plan.
More drinks
Sources
- Nutrient data: USDA FoodData Central (search “Green Tea”)
- FDA: Spilling the Beans — How Much Caffeine Is Too Much?
- MedlinePlus: Ciprofloxacin
Last reviewed October 2026. How we rate foods.
General information only, not medical advice. If you take medicine or manage a health condition, check with your doctor, pharmacist or a registered dietitian before changing your diet. Read our medical disclaimer.