Whether or not AG1 will break a fast depends on the type of fasting you are doing and your individual goals and preferences. If you are doing a water fast, which involves consuming only water for a period of time, then consuming it would technically break the fast, as it contains calories and nutrients. However, if you are doing a fast that allows for the consumption of certain liquids, such as a juice fast or a bone broth fast, then consuming it may be allowed, as long as it fits within the guidelines of your specific fasting protocol. If you are doing intermittent fasting, which involves cycling between periods of eating and periods of fasting, then consuming AG1 during your fasting period may be a matter of personal preference. Some people prefer to consume only water or other calorie-free beverages during their fasting period, while others may choose to consume small amounts of nutrient-dense foods like AG1 to help support their health and energy levels.