

Be sure to sign up for my list below so you can get early access to these articles. I get that intermittent fasting (and dieting in general) can seem overwhelming since there's so much conflicting info out there. The 5 calories and 1g carbohydrates is negligible, and will not break your fast. It contains 0g fat, 1g carb, and 0g protein. Go ahead and put that milk in your coffee, y'all. So, this nutrition label from Starbucks black coffee shows 5 calories in 12 fl oz. In that vein, I think sprucing up your beverage is perfectly fine, provided that it helps you get through the fast so that the great majority of your calories are still being eating in the eating window.


The answer I like to give in this situation has to do with what I believe is the main benefit of intermittent fasting (making the caloric deficit easier). For most people, the nutrients in 12 cups (240470 ml) of black coffee aren’t enough to initiate a significant metabolic change that would break a fast (3, 4). So if you're looking to sip on something warm during the fasted state, you can opt for black coffee or unsweetened tea and keep your mushroom coffee to your eating window. Second, as long as it helps you put ~97% of the day's calories in the eating window, you are still getting what I believe to be the primary benefit of intermittent fasting Pure black coffee and unsweetened tea both fall under one gram carbs and protein and therefore will not break a fast. If you prefer a splash of coffee in your heavily sweetened latte, yes, it will break your. Something I learned from Martin Berkhan's LeanGains page is that the fasted state isn't an instant on/instant off switch, so all you nerds grasping for the variety of physiological benefits of fasting are in the clear for adding a touch of honey to your tea.Ī total amount of up to about 50 calories (50 is Martin's suggested upper-limit) during your fasting period isn't going to lose you much if anything. Whether coffee breaks your fast depends on how you take your brew. First, the fasted state isn't an instant on/instant off switchĪs long as you are staying under roughly 50 calories for your entire fasting period, you are good to go.
