MCT oil contains no protein at all, but it is highly caloric. Typically, protein inhibits autophagy, but butter contains such a small amount that it’s unlikely to matter. So, butter does trigger some digestive processes, while MCTs are less likely to do so.īutter also has a small amount of protein in it. MCTs are absorbed directly through the portal vein and taken immediately to the liver, whereas LCTs stimulate pancreatic enzymes and require the release of bile into the GI tract. MCTs and LCTs have a different effect on our gastrointestinal system. Butter, on the other hand, is mostly composed of long-chain triglycerides (LCTs). MCTs are produced from coconut oil and, as the name suggests, are 100% made up of medium-chain triglycerides. However, butter and MCT oils have a different chemical composition. Doctors have also used MCT oil to induce ketosis in the management of epilepsy, demonstrating that the consumption of MCT oil can still produce a ketogenic environment. Plus, the body easily converts MCTs into ketones to use for energy. Even though MCT oil is calorically dense, it’s been shown to improve insulin-mediated glucose metabolism. If you’re fasting for longevity, black coffee likely does not break a fast.īutter coffee, popularized by the bulletproof-coffee brand, typically has added butter and/or medium-chain triglyceride (MCT) oil.If you’re fasting for gut rest, black coffee does break a fast.If you’re fasting for weight loss or metabolic health, black coffee likely does not break a fast.Coffee intake may also elicit a reflux sensation, which isn’t ideal for those with heartburn issues. Coffee stimulates gastrin (a hormone that triggers the secretion of gastric acid) and gallbladder contraction, both of which have an impact on our gastrointestinal tract. What if you’re fasting for gut rest? Even though black coffee has negligible calories, it does trigger some digestive functions. This same study hasn’t been replicated in humans yet, so we have to take these results with a hefty grain of Himalayan sea salt. The authors of this study related the increase in mTOR inhibition and other cellular processes to the polyphenols in coffee.
Conversely, there have been many long-term studies linking regular coffee consumption to positive health benefits, including reducing the risk of type-2 diabetes.Īnother study showed that consumption of both caffeinated and decaffeinated coffee trigger autophagy in mice, which is good news for longevity.
This was also a short-term study, so further research would be necessary to show whether coffee has any detrimental effects on insulin sensitivity in the long term. During nutrient deprivation, cells become slightly more insulin resistant, likely due to the body prioritizing fuel to go to the brain instead of other cells in the body. One literature review demonstrated that coffee was associated with a decrease in insulin sensitivity, but scientists have observed those same short-term effects in fasting in general, with or without coffee. These studies also considered whether people got those same benefits from a restricted-calorie fast (RCF), accounting for less than 25% of energy needs, and saw the same result. The answer: Yep! The benefits are intact. Several studies have examined whether fasting still demonstrates health and disease-prevention benefits if the people fasting drink coffee. Do you take it black? With cream? With butter? Black Coffee on a FastĬoffee itself has almost no calories, so it already has that going for it. It also depends on how you drink your coffee. Whether coffee breaks your fast depends on why you’re fasting. Most people fast for one of four reasons: weight loss, metabolic health, gut rest, or overall longevity. Picture this: You wake up from an overnight fast, pour yourself a steaming cup of coffee, bring it to your lips, and then, just as you’re about to take a sip… you think, “Wait, am I allowed to have this?” It smells so good, but does drinking coffee break your fast?
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