A colonic is a process that irrigates the colon with liquid fed through a rectal tube, according to MedicineNet. The intended purpose of a colonic is to cleanse or detoxify the body, along with other alleged health benefits. No conclusive scientific evidence supports these claims.
Mayo Clinic explains that doctors sometimes order colon cleansing to prepare for other medical procedures, such as a colonoscopy. However, colonics are generally not recommended strictly for flushing out toxins. Colonics have actually been shown to cause harm in some cases, and they can cause cramping, bloating, nausea and vomiting. Colonics can also lead to dehydration, bowel perforations, infections and electrolyte imbalance. Extreme caution is advised for people considering a colonic.