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About toxins What are toxins – and how do they get into the body in the first place? Internal toxins include natural byproducts created by the body during metabolism, such as lactic acid, urea and waste from the gut microbes. External toxic exposures enter the body through eating, drinking, breathing or penetration of the skin. These can come in the form of air pollutants, food or water contaminated with chemicals or heavy metals, household products such as laundry detergent and even beauty products like facial cleansers, body wash and makeup. The body’s built-in detoxification system includes the liver and kidneys, with assistance from the lungs, lymphatic system, digestive tract and skin. Briefly, the liver breaks down harmful substances, which are then filtered out through the kidneys. The digestive tract also expels them through bowel movements. But our bodies aren’t always functioning optimally. That’s why a proper diet and improved lifestyle behaviors, such as increased exercise and sleep, may have a significant – and positive – impact on the body’s detoxification system. Having a diverse microbiome and an abundance of healthy gut bacteria also helps to rid the body of harmful substances. Fermented foods such as kefir, sauerkraut and cultured dairy products can benefit gut health. These foods contain probiotics, which are the beneficial bacteria that live in your gut. Another category, called prebiotic foods, are also beneficial for gut health. They provide nutrition and energy for the healthy probiotics in the gut and are high in fiber. Examples of prebiotic foods are whole grains and fruits and vegetables, particularly bananas, greens, onions and garlic. The potential harms of detox diets Through glossy and pervasive advertising, detox diets perpetuate a quick-fix mindset about weight and body image rather than promote lifestyle changes that are sustainable for a lifetime. Although proponents claim that detox diets and juice cleanses lead to weight loss, improved liver function and overall better health, research shows they have little to no effect. What’s more, they can lead to side effects, including headaches, fatigue, weakness, fainting and irritability. However, studies show there is some evidence that certain foods and spices, such as coriander, may enhance the body’s natural detoxification pathways. According to the Academy of Nutrition and Dietetics, other foods that may give the body’s own detox system a boost include cruciferous vegetables like broccoli and Brussels sprouts, berries, artichokes, garlic, onions, leeks and green tea. Eating adequate amounts of lean protein may also benefit the body’s natural system by maintaining adequate levels of glutathione, the body’s master detoxification enzyme, or catalyst. Glutathione is an enzyme produced by the liver that is involved in numerous processes within the body including building and