If you’re asking whether it’s possible to clean 15 kg of waste from your colon overnight, that claim is not medically realistic. The colon does not normally contain anything close to 15 kg of fecal waste, and there is no safe overnight cleanse that removes that amount.
Avoid “colon cleanse” products, large doses of laxatives, enemas, or fasting specifically to achieve this—they can cause dehydration, electrolyte disturbances, or bowel injury.
If you’re constipated, safer approaches include adequate fluids, dietary fiber, regular movement, and—when appropriate—an evidence-based laxative such as polyethylene glycol. Severe abdominal pain, vomiting, significant swelling, blood in the stool, or inability to pass stool/gas warrants medical attention.
