Does caffeine affect your sugar levels?

For many people, moderate caffeine consumption does not significantly affect blood sugar levels. However, people with diabetes may experience an effect.

Caffeine can cause a temporary increase in blood sugar levels. This happens because caffeine stimulates the release of adrenaline, which can increase blood sugar levels by promoting the release of glucose from the liver. Some research suggests that caffeine may decrease insulin sensitivity, making it harder for cells to use glucose effectively.

Long-term consumption of coffee, whether caffeinated or decaffeinated, may reduce the risk of developing type 2 diabetes by improving insulin sensitivity over time. The response to caffeine can vary greatly from person to person. Some people with diabetes find that caffeine has little to no effect on their blood sugar levels, while others may experience significant changes.

It is generally recommended that people with diabetes consume caffeine in moderation. The FDA recommends a daily limit of 400 mg of caffeine for healthy adults, which is about 4-5 cups of coffee. People with diabetes should monitor their blood sugar levels to see how caffeine affects them personally.

In conclusion, while caffeine can affect blood sugar levels, the impact is not the same for everyone. For people with diabetes, it is essential to consume caffeine with caution and monitor its effects closely.

Source: https://www.mayoclinic.org/diseases-conditions/type-2-diabetes/expert-answers/blood-sugar/faq-20057941

Author: Prof. Dr. Dirk Devroey - Latest update: 2023-12-12 - Copyright: Clinifacts 2025