If you eat a lot of butter, your body won’t need to tap into its own energy stores as much. When you eat fat, it doesn’t really raise your blood sugar, but you do take in a lot of energy (aka calories). We’ve established that drinking black coffee while fasting is probably okay, at least for most people.īut what if you add butter to the coffee? Does drinking melted butter break your fast?Ĭonsider for a moment what happens when you eat (or drink) butter.īutter consists almost entirely of fat. You’ll still get a lot of health benefits, and you can get your caffeine fix as well. But the caffeine doesn’t appear to raise fasting blood sugar, which is what we’re talking about here.)įor most people, it’s reasonable to drink black coffee while fasting. ( Side Note: In people with diabetes, high caffeine intake results in higher blood sugar after a carb-rich meal. You can drink black coffee, and you’ll still get plenty of health benefits from fasting.įor example, coffee won’t stop you from burning body fat or lowering your blood sugar. (One notable exception would be artificial sweeteners–such as aspartame or sucralose–because even though these have zero calories, they also have several harmful effects.) In most cases, drinking things that have zero calories is fine when you’re fasting. The only exception would be for something like autophagy that doesn’t start until you’ve been fasting for multiple days.īlack coffee means there is no sugar or cream added, so it basically has no calories. Note: Most of the info below applies to both daily “intermittent” fasting and multi-day “extended” fasting. But I’ve noticed some of those same benefits–like increased energy and focus–from consuming a little extra fat while I fast.) Does Bulletproof Coffee Break Your fast? (Personally, I’ve never tried Bulletproof Coffee. Subjectively, some people say it makes them feel more energetic, improves mental clarity, or controls their hunger. That way, your body can use the fat for energy, and also turn some of it into ketones (the alternative energy source your brain uses when you fast), without significantly raising your blood sugar or insulin levels (more about insulin below). ![]() Basically, the idea is to take in energy without consuming significant amounts of protein or carbs (just fat).
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