Does black coffee break a fast5/1/2023 ![]() ![]() ![]() Both are favorable responses that indicate a movement toward improved fat burning. What we found was that coffee on an empty stomach raised my ketone level and lowered Keith’s glucose level. Specifically, we drank black coffee in a fasted state and then tested our blood glucose and ketones for the next two hours. On my second YouTube Channel, my husband and I tested the effect coffee had on our bodies during a fast. But, if that is the only thing that you are consuming in the morning hours, you may be gaining an advantage with respect to autophagy and fat release. Your cup of black coffee might start your metabolism clock, which technically opens your eating window. ![]() We know from studies with human participants that caffeine improves fat oxidation, which is the breakdown of fat (4). Coffee Induces AutophagyĪnother consideration is that there are helpful components in coffee that have been shown in mice studies to induce autophagy, which is a process of cellular clean up that is enhanced when we practice intermittent fasting (2) (3). The consumption of these drinks did not seem to hinder their results in a significant way. However, many of the studies done on intermittent fasting allowed participants to consume non-caloric drinks like coffee and tea. If they start drinking coffee at 7 AM, their eating window would close at 3 PM. If you follow that wisdom alone, a person following a 16:8 style of intermittent fasting would start their eight-hour eating window with their first sip of caffeinated coffee. First of all, if your coffee contains caffeine, the caffeine would need to be processed by your liver, which is your main metabolic organ (1). This is a gray area for sure, but there are a few hints we can take from the scientific literature. The question becomes: does black coffee count when it comes to starting your metabolic clock? Scientific Research on Black Coffee Coffee & Your Metabolic Clockīlack coffee is a non-caloric drink. What that means is that your body is able to utilize and process food better at the beginning of your eating window than at the end. When your clock starts and your metabolic engine begins to rev up, your body experiences a peak in insulin sensitivity and fatty acid oxidation that gradually diminishes as the day goes on. An important activator of your metabolism clock is your first bite or sip of food. You can think of your metabolism as being a clock that runs well for a number of hours of the day and then winds down as the day ends. One of the biggest advantages of intermittent fasting is that it allows you to work with your body’s natural metabolic rhythm by consuming food during the hours of the day when your metabolism is most active. My own personal tests with black coffee.Scientific studies on black coffee and intermittent fasting.What intermittent fasting does to the body. ![]()
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