Scroll all the way to the end if you want to know which sweetener we’re talking about. You wouldn’t expect that to matter much when it comes to sweeteners, but in fact, one of the most common sweeteners in the world’s food supply, a sweetener dozens of fasters are likely ingesting by the liter, is made up of amino acids… which means it shuts down autophagy and throws your longevity benefits out the window. Similarly, some zero-calorie sweeteners activate your GI tract even though they don’t end up metabolizing in any meaningful way.Īs we discussed in the first part of our DOES IT BREAK MY FAST series, if a sweetener does have calories, the type of calorie also has a large impact on fasting, especially for longevity - anything with amino acids stimulates an mTOR growth pathway which inhibits autophagy. Surprisingly, some non-caloric and minimally caloric sweeteners actually do impact your insulin response, even without elevating blood glucose levels. Does it trigger growth pathways that would shut down autophagy?.Does it activate your digestive system?.Does it contribute to a negative blood glucose/insulin response?.So when we consider the question of whether or not a sweetener breaks your fast, we’re really considering three different questions: And depending on your goal, calories may not even be the most important factor. We’ll walk you through it.Ĭalories are only one component among many that decide whether or not something breaks a fast. If you’re confused, you’re not alone, but don’t worry. For the purposes of our sweetener discussion, we’ll break these goals down into the three largest fasting categories:īefore we go in-depth and give you the sweet, sweet deets on each individual sugar alternative, let’s make sure we dispel a rather large misconception: food doesn’t have to have calories to break a fast.Īnd conversely, just because it does have calories doesn’t mean it does break a fast. For the extremely strict amongst us who want to get as much out of their fast as possible, it’s likely best to avoid sweeteners altogether.īut for those who have a specific goal in mind for their fast, there’s a bit of wiggle room. In particular, whether the sweetener contributes to a negative blood glucose/insulin response, activates the digestive system, or triggers growth pathways that would shut down autophagy.įasting can be tricky for anyone with a sweet tooth. The impact a sweetener has on an intermittent fast depends largely on the specific sweetener.
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