Side effects of fasting may include headaches, weakness, muscle aches, nausea, lightheadedness, irritability, racing heart, exacerbation of joint symptoms, mild abdominal discomfort, and hunger. However, everyone reacts differently to detoxing. While one person may feel energized and revitalized, another may feel sluggish. Generally it is reported that hunger disappear after the first day.
With this new-found popularity, the number and type of cleanse diets has soared, from food-based "liver detoxes" to liquid-only fasts for several weeks and everything in between. While the extreme cleanses often get a bad rap—Beyonce confessed that drinking the maple syrup-lemon-cayenne pepper concoction made her "cranky"—many women swear by cleanse diets to lose weight, increase energy, and even help clear up acne.