Apple cider vinegar has been said to do everything from helping improve your energy levels to boosting your immunity, but it's also a powerful tool for increasing your metabolism. ACV "helps increase the amount of fat burned for energy," according to Dr. Zenhausern. It also only contains three calories per tablespoon and is loaded with essential vitamins and minerals like "potassium, magnesium, fiber, amino acids, and antioxidants," Lee told POPSUGAR. You can drink ACV, mix it into a homemade salad dressing, or add it to your morning lemon-water concoction; but while there are a variety of ways to consume in, just make sure you're not exceeding the recommended daily amount.