Many individuals struggle to achieve their ideal body weight. Many people spend enormous amounts of money on gym memberships, personal trainers, and weight loss pills but achieve minimal results. More than a problem of metabolism and food intake, recent studies show that intestinal parasites can also be responsible for unwanted weight gain. These intestinal parasites enter the human body through different channels like food and water. These parasites may be one among the causes of weight gain and the reason why certain people have trouble losing weight. These parasites hamper the digestive process, which may then cause unwanted weight gain. The presence of intestinal parasites in the human body is usually detected by looking for the following symptoms: