- With Mayo Clinic endocrinologist
Maria Collazo-Clavell, M.D.
read biographyclose windowBiography of
Maria Collazo-Clavell, M.D.
Maria Collazo-Clavell, M.D.
Dr. Maria Collazo-Clavell is board certified in internal medicine, endocrinology, diabetes and metabolism. She is a consultant in the Division of Endocrinology, Diabetes, Metabolism & Nutrition at Mayo Clinic and an assistant professor at Mayo Clinic College of Medicine.
The Aibonito, Puerto Rico, native has been with Mayo Clinic since 1994.
She is a member of the American Association of Clinical Endocrinologists, the American College of Endocrinology, the American Diabetes Association and The Endocrine Society.
Dr. Collazo-Clavell is medical editor for the Web site's diabetes content and the book "Mayo Clinic on Managing Diabetes." Her clinical interests include management of type 1 and type 2 diabetes, obesity and nutritional disorders.
More answers
- Carbohydrate counting and diabetes: Looking beyond carbs
- Diabetes management: Does aspirin therapy prevent heart problems?
- Diabetes: Are electric blankets off-limits?
- Late-night eating: OK if you have diabetes?
- Diabetes foods: Is honey a good substitute for sugar?
- Reactive hypoglycemia: What causes it?
- Diabetes treatment: Can cinnamon lower blood sugar?
- Artificial sweeteners: Any effect on blood sugar?
- Blood sugar and mood: Any connection?
- Byetta: Can diabetes drug also help me lose weight?
- Vegetarian diet: Can it help me control my diabetes?
- Glycemic-index diet: A helpful tool for diabetes?
- Diamaxol: An herbal cure for diabetes?
- Hyperinsulinemia: Is it diabetes?
- The 'dawn phenomenon': What causes it?
- Glucosamine: Does it affect blood sugar?
- Diabetes: How does it affect my liver?
- Diabetes diet: Should I avoid sweet fruits?
- Whole grains: Good for diabetes prevention?
- Selenium supplements: Do they increase my diabetes risk?
- Diabetes: Do alcohol and tobacco use increase my risk?
- see all
Mayo Clinic Health Manager
Get free personalized health guidance for you and your family.
Get Started
Mayo Clinic Housecall
Stay up to date on the latest health information.
What you get
- Free weekly e-newsletter
- Mayo Clinic expertise
- Recipes, tools and other helpful information
- We do not share your e-mail address
Question
Caffeine: Does it affect blood sugar?
Does caffeine affect blood sugar?
Answer
from Maria Collazo-Clavell, M.D.
Short-term studies indicate that caffeine impairs insulin action but not necessarily blood sugar (glucose) levels in young, healthy adults. However, in individuals with type 2 diabetes, the impact of caffeine on insulin action may be associated with a small but detectable rise in blood sugar levels, particularly after meals. The amount of caffeine noted to have caused this effect was about 500 milligrams (or the equivalent of five cups of plain, brewed coffee) a day.
For individuals with type 2 diabetes who are struggling to control their blood sugar levels, limiting your caffeine intake may provide a benefit.
Next question
