![]() Journal of Clinical Investigation: “Epinephrine-induced Insulin Resistance in Man.” Sacha Uelmen, director of nutrition, American Diabetes Association. Joslin Diabetes Center: “What Is Insulin Resistance?” Mayo Clinic: “Caffeine Content for Coffee, Tea, Soda and More,” “Caffeine: Does It Affect Blood Sugar?” “Diabetes: Complications,” “Nutrition and Healthy Eating.” Even though this drink has a tiny amount of caffeine, it doesn’t have the same effect on your blood sugar or insulin.įDA: “Medicines in My Home: Caffeine and Your Body.”ĭiabetes Care: “Acute Effects of Decaffeinated Coffee and the Major Coffee Components Chlorogenic Acid and Trigonelline on Glucose Tolerance,” “Caffeine: A Cause of Insulin Resistance?” “Caffeine Can Decrease Insulin Sensitivity in Humans,” “Caffeine Increases Ambulatory Glucose and Postprandial Responses in Coffee Drinkers With Type 2 Diabetes,” “Coffee, Caffeine, and Type 2 Diabetes.” If yours spikes after your morning cup, you may want to switch to decaf. The caffeine in a cup of java makes it tougher to control your blood sugar. If you already have type 2 diabetes, this may not hold true. These compounds reduce inflammation in your system, which can raise your chance of having the disease. Experts think that’s because the drink is high in antioxidants. Studies show that coffee may lower your odds of getting type 2 diabetes in the first place. When you compare these results, you’ll know if caffeine has an impact. Then you’ll test after you skip the drink for a few days. You might test your blood sugar throughout the morning after you have your usual cup of coffee or tea. To find out if caffeine raises your blood sugar, talk to your doctor or a dietitian. But other research shows that caffeine could still cause a spike, even if you always start your day with a cup of joe. Some experts think your body gets used to that amount of caffeine over time. People with diabetes who are regular coffee drinkers don’t have higher blood sugar levels than those who aren’t. How much caffeine you usually get may also play a role. Your response depends on things like your age and weight. People can have different reactions to the drug. You may be able to handle more or less caffeine. That’s the amount in about one or two cups of brewed coffee or three or four cups of black tea. It only takes about 200 milligrams of caffeine to affect your blood sugar. Lack of sleep may also lower your insulin sensitivity. Caffeine keeps adenosine which plays a big role in how much insulin your body makes. It also controls how your cells respond to it. This molecule plays a big role in how much insulin your body makes. It may also keep your body from making as much insulin. Epinephrine can prevent your cells from processing as much sugar. Caffeine raises levels of certain stress hormones, like epinephrine (also called adrenaline).Scientists are still learning how caffeine affects your insulin and blood sugar levels. Over time, this may raise your chance of diabetes complications, like nerve damage or heart disease. This may lead to too-high blood sugar levels. Caffeine may make it tougher to bring it down to a healthy point. After meals, your blood sugar rises higher than normal. ![]() If you have type 2 diabetes, your body already doesn’t use insulin well. This causes your body to make more insulin, so you have higher levels after meals. They don’t absorb as much sugar from your blood after you eat or drink. That means your cells don’t react to the hormone by as much as they once did. That’s because caffeine can affect how your body responds to insulin, the hormone that allows sugar to enter your cells and get changed into energy.Ĭaffeine may lower your insulin sensitivity. Their reading also jumped by more after each meal. The result: Their blood sugar was 8% higher than on days when they didn’t have caffeine. That’s about the same amount as drinking two cups of coffee with each meal. One study looked at people with type 2 diabetes who took a 250-milligram caffeine pill at breakfast and another at lunchtime. It can raise blood sugar and insulin levels for those with the disease. How Does Caffeine Affect Your Blood Sugar?Ī growing body of research suggests people with type 2 diabetes react to caffeine differently. But if you have type 2 diabetes, caffeine may make it harder to keep your blood sugar in check. For healthy people, it’s usually a harmless perk-me-up. Whether it’s from coffee, tea, soda, or chocolate, most Americans get caffeine every day.
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