Parasites are often thought of as a problem only in third world countries, but some studies have demonstrated that is also a problem in the United States. One study concluded that 32% of people had parasites. These parasites can cause many health problems because they release toxins that can damage organs. This can lead to weight gain, fatigue, irritability and other symptoms. Vitabase Parasite Complex contains herbs like Black Walnut, Garlic, Butternut Bark, Wood Betony and Pau D Arco to cleanse the body of parasites. A 10 day supply is in each bottle. Vitabase recommends waiting 10 days between the first and second bottles to ensure complete removal.