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For most young, healthy adults, caffeine doesn't appear to noticeably affect blood sugar (glucose) levels, and having up to 400 milligrams a day appears to be safe.

Some studies suggest that drinking coffee — whether caffeinated and decaffeinated — may actually reduce your risk of developing type 2 diabetes.

If you already have diabetes, however, the impact of caffeine on insulin action may be associated with higher or lower blood sugar levels. For some people with diabetes, about 200 milligrams of caffeine — or the equivalent of one to two 8-ounce (240-milliliter) cups of plain, brewed coffee — may cause this effect.

Caffeine affects every person differently. If you have diabetes or you're struggling to control your blood sugar levels, limiting the amount of caffeine in your diet may provide a benefit.

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ian ray

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2y ago

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Related Questions

Does black coffee affect your blood sugar levels?

Not unless you add sugar to it.


What can you eat or drink before a fasting blood test?

Water. Anything else will affect the glucose levels...including black coffee.


Can coffee and splenda intake before a blood test effect cholesterol levels?

No, coffee and Splenda will not affect cholesterol levels.


What can reduce blood glucose levels immediately?

nothing


Can you drink black decaf coffee before a blood test?

User responses: No. From what I have read caffeine does affect cholesterol levels and/or the way they can be interpreted when reading results of a cholesterol blood test. I would suggest that you be clean of any caffeine - three or more days ahead of time - to obtain a caffeine-free result.Advice seems to vary. Some say that black coffee (no sugar, no milk) is fine. Sources for that listed below.


Can you drink black coffee before a blood test that requires fasting but not for blood work?

It is generally recommended to only consume water before a fasting blood test, as black coffee can potentially affect the results by interfering with certain measurements. However, for regular blood work that does not require fasting, black coffee should not have an impact on the results.


Why does black coffee raise your blood sugar?

Black coffee affects blood sugars because caffeine can impair insulin action, especially in people with Type 2 diabetes.


What can cause coffee ground looking stools?

Black "Coffee Ground Stool" is usually an indicator of gastrointestinal bleeding (Not always, but usually). Often it means bleeding in the upper gastrointestinal tract (Esophagus, stomach or small intestine) . The coffee grounds are coagulated blood. Consider this to be an emergency and go to a Doctor immediately.


Can you have a cup of black coffee before a blood test that requires fasting?

No, it is best not to consume anything except water before a blood test that requires fasting. Coffee, even black coffee, can affect your test results by increasing certain markers in your blood. It's essential to follow fasting instructions for accurate test results.


Can you drink black coffee before a blood test is done?

Yes, you can drink black coffee before a blood test. However, it's best to check with your healthcare provider if it is okay to consume any beverages before the test, as certain tests may require fasting for accurate results.


Does caffine raise blood sugar?

It would seem not as my MD has no problems with my drinking black coffee prior to coming in for blood tests.


Can you drink black coffee 6hrs before a blood test?

No. It is best to fast 8hrs before a blood test. If you have to take prescribed medication before blood work, it is best to take that medication with a small glass of water. Any food or liquid that you introduce into your body before a blood test is performed will cause innaccurate results because your physician is looking to determine baseline levels, not baseline levels plus the effect of coffee. I would imagine that the coffee is not something that you have to drink so I would just stay away so that you spend your money on the most accurate testing and medical advice that you can get.