Most mushroom powders are generally low in calories, protein, and carbohydrates. This makes them a good option for those who want to maintain a fasting state.
However, some mushroom products may contain added sugars, flavors, cream, or other ingredients that can increase the calorie count and potentially break your fast. Therefore, before adding a teaspoonful of mushroom powder to your tea or coffee, check the ingredients to confirm that it does not have enough calories to break your fast.