Monday, March 3, 2008

What's This About Caffeine Raising Blood Glucose Levels?

What's this about caffeine raising blood sugar levels? If you are a diabetic, is it safe to drink caffeinated coffee, tea, and soft drinks?

A clinical trial at Dartmouth Medical School in New Hampshire found that caffeine may indirectly raise blood sugar levels.

Testing young adults aged 18 to 22, the doctors found that higher levels of insulin after intake of caffeine. The higher level of insulin suggests that their bodies needed more insulin to move the same amount of glucose out of the bloodstream and into cells.

In healthy young adults who don't have diabetes, blood glucose levels stayed the same. In type 2 diabetics, however, whose blood glucose elevations are caused by insulin resistance, caffeine raises blood glucose levels.

Instant black tea with caffeine, in particular, raises blood glucose levels, but it does not raise them immediately. Instant black tea drinks seem to cause a spike in insulin production right after you drink them, clearing out blood sugar, but they interfere with the release of insulin a couple hours later, allowing you to get a sugar high.

This does not mean, however, all coffee and all tea are bad for diabetics, in fact they can sometimes help prevent diabetes, as you can read here.

You may also be interested in:

The Seven Habits of Highly Successful Diabetics
Effects of High Blood Sugars on the Immune System
Dieters: Can You Eat All the Foods You Love and Still Lose Weight?
How Teens with Type 2 Diabetes Can Lose Fat and Gain Muscle
When It's Better for Diabetics to Be Couch Potatoes
Are Sugar-Free Candies and Deserts for Diabetics Really Sugar-Free (And What to Do When They Are Not)
Is an All-Natural Way to Cleanse the Colon Good for Diabetics?
What Doctors Don't Tell Diabetics About Fats and Carbs
What Doctors Don't Tell Diabetics About LDL Numbers
Can Drinking Decaf Speciality Coffee Prevent Diabetes?
A New Ayurvedic Herb for Diabetes?
Have Scientists Discovered a Diabetic Fat-Burner?
Vinegar for Type II Diabetes
Reduce Risk of Diabetes by Eating Veggies
Chromium for Diabetes
Vitamin C for Diabetes
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Vitamin E for Diabetes
Vitamin E for Diabetes: How Much Is Too Much?
DHEA and Diabetes
Diet, Diabetes, and Gum Disease
To Prevent Diabetes, Low-Carb Is Better than Low-Fat
R-Lipoic Acid and Acetyl-L-Carnitine as Fat Burners for Diabetes

Citations:

Bryans JA, Judd PA, Ellis PR. The effect of consuming instant black tea on postprandial plasma glucose and insulin concentrations in healthy humans. J Am Coll Nutr. 2007 Oct;26(5):471-7

MacKenzie T, Comi R, Sluss P, Keisari R, Manwar S, Kim J, Larson R, Baron JA. Metabolic and hormonal effects of caffeine: randomized, double-blind, placebo-controlled crossover trial. 1: Metabolism. 2007 Dec;56(12):1694-8.

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