Acute caffeine intake at high levels can slightly raise fasting blood sugar levels but more importantly raise post-meal blood sugar levels. This is more of a risk for people who already have blood sugar control issues, including people with type 2 diabetes.
Does coffee raise fasting blood sugar?
No substantial effects of coffee or caffeine on fasting glucose concentrations were observed. The increased fasting insulin concentration after high coffee consumption in our study probably reflects decreased insulin sensitivity.
Is it OK to drink black coffee before a fasting blood test?
Can you drink coffee if youre fasting before a blood test? Even if you drink it black, coffee can interfere with blood test results. Thats because it contains caffeine and soluble plant matter, which might skew your test results. Coffee is also a diuretic, which means that it will increase how much you pee.
Can I drink coffee before a fasting blood glucose test?
Coffee: Coffee affects digestion and can also affect the results of a blood test. As such, people should not drink coffee before a fasting blood test. Chewing gum: Chewing gum, even if it is sugar-free, should be avoided when fasting for a blood test.
How do you cheat a fasting blood sugar test?
Is There Anyway To Cheat A Fasting Blood Sugar Test? There is no way to cheat the test. You wont be able to manipulate the way your body processes sugar unless you have access to specific medications.