Coffee, Fasting, and Weight Stall
I have compiled my results from almost 2 weeks of a personal test of not drinking coffee during certain times of the day to see how coffee affects fasting and weight loss. I finished this test on Coffee, Fasting, and Weight Stall some time ago, and decided it was time to finish up this report.
A one-person test does not mean much in terms of data, since our bodies all function very differently. So, take this information with a grain of salt. There are many other factors, including your eating style. That aside, many health professionals consider that moderate coffee consumption does provide some health benefits.
Eating Style Considerations
I typically practice intermittent fasting 20 hours every day, between my last meal and my first meal the next day. So, that is a 4 hour eating window each day. This is sometimes referred to as 20:4, and some people also consider this eating stlye very close to eating OMAD, or One-Meal-A-Day. Essentially, this means eating all of your calories for any given day in a smaller timeframe.
I also eat a low carb-high fat diet. I have been doing this for the better part of a year and a half. Also, I did not knowingly make any major changes to my regular diet other than when I noted drinking coffee for this test.
I personally did not find cutting back on coffee that hard to do. You can see the test rules I developed for myself by going to this post on test parameters. I did not experience any withdrawal symptoms or any jitters. Basically, I was only drinking 2 cups of coffee twice a day (4 cups total), and it was time restricted to certain hours in the morning and early afternoon.
Initial Weight Loss
I would like to report that I did lose a couple of pounds in the first 3-4 days. However, I gained that weight back. I cannot say for sure the weight loss and weight gain had anything to do with cutting back on coffee consumption. Obvioulsy, there are so many other things that could have contributed to these results.
Initally, I was interested in doing this test, because I had read two separate views from a medical doctor, and also a respected researcher. Granted, these were comments made on Twitter, and not necessarily data reported from recognized long-term medical studies. The medical doctor, Dr. Bob Arnot, is the author of "The Coffee Lover’s Diet: Change Your Coffee, Change Your Life". The researcher, Dr. Rhonda Patrick, is a Ph.D in biomedical science and an expert of nutritional health.
On one hand, Dr. Arnot apparently makes the claim in his book that drinking coffee burns extra calories to help you lose weight. On the other hand, Dr. Patrick speculates that coffee stimulates a hormonal response, and this will break a fasted state.
Personal Test Results
I would say my test results were at best "inconclusive". I did lose a bit of weight, but did not keep it off. I honestly do not know if drinking coffee breaks a fast. My best guess is that in my case it does not.
I will say that one positive effect is that I have learned that I do not have to drink coffee constantly throughout the day. I since have cut back on my coffee drinking. I continue to avoid drinking java first thing in the morning when I get up, and also no longer drink coffee later in the day.