Does black coffee really effect blood work?
You may think that a water-brewed drink such as black coffee won’t upset your fast, but the caffeine and other organic compounds in coffee beans that infuse the water will. These substances can change your blood chemistry or alter body functions to do so and therefore threaten the objectivity of your blood sample analysis.
Can you drink black coffee before a cholesterol test?
The short answer is that it’s fine to drink a cup of plain black coffee before a cholesterol test. Dr. Tomey says a single cup of black coffee would make only a small difference — perhaps a couple of points — in your HDL, triglycerides and total cholesterol.
Does drinking coffee before blood tests affect the results?
How can the drinking of coffee before going for a blood test affect its results? Coffee can affect your metabolism, your blood as well as the results of your blood test. To avoid an inaccurate result, only water should be permitted for particular tests.
Can you have black coffee while fasting for blood work?
Your doctor will let you know if and when you should be fasting or will refer you to the testing laboratory for explicit instructions. Unless you are given an exception, you should not eat any food during this time or drink hot or iced black coffee or tea, soda, juice, or any liquid but plain water.