Intermittent fasting is an eating pattern that limits food consumption to certain hours of the day. Some research suggests that it may have benefits beyond weight loss, like improved brain and heart health. However, with all diets, it is important to consult with a medical professional especially if you have: diabetes, problems with blood sugar regulation, low blood pressure, a history of eating disorders; or take medications, are underweight, are a woman who is trying to conceive, a woman with a history of amenorrhea, or are pregnant or breastfeeding.