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Gut BODY HANDBOOK
Gut ยท ยง58
Colonic Hydrotherapy
A colonic is 20 to 60 litres of warm water pumped through a rectal tube into your colon, sold as a "detox" for your body. The idea it rests on, that old stool rots and leaks poison into your blood, was dropped by medicine in the 1930s, because that isn't how the body works Ernst 1997. What $75 to $150 a session buys is an emptied bowel, the same thing a $5 laxative does, plus a small but real risk of a torn colon.
Avoid ยท As-needed Evidence Emerging Chapter Gut

No study has ever found a benefit. The energy, the mood, the clear skin, the "detox" โ€” none of it registers when anyone measures carefully. Across the colon-cleansing literature the benefits are unsubstantiated and the harms recurring 1. No named toxin has ever been shown leaving the body in blood, urine, or stool.

Your liver and kidneys already do this job, and they were never blocked. The colon's work is absorbing water and salt from stool, not storing poison 2. And the lining renews itself every three to five days, so there is no crust of ancient stool cemented to the wall for a tube to dislodge โ€” whatever the practitioner shows you in the viewing window is recent.

Most people book a colonic to fix constipation or bloating. Those have cheap, low-risk fixes that don't involve a tube.

The fine print โ€” when to skip it, and what people get wrong

The rare harms are real: a torn colon needing surgery 3; infection from dirty equipment, which killed several people in one Colorado clinic 4; and sodium and potassium crashes that trigger seizures 1.

Skip it entirely if pregnant, on blood thinners, or living with Crohn's, colitis, diverticulitis, heart, or kidney disease โ€” for these the risk of a tear, a bleed, or an electrolyte crash goes from rare to substantial.

The "boosts immunity" claim runs the biology backwards: a colonic flushes out the gut bacteria the immune system co-evolved with. Real "detox" needs no machine, just sleep, water, and not drinking heavily.

References
  1. 1Mishori R, Otubu A, Jones AA (2011). The dangers of colon cleansing. Journal of Family Practice. link
  2. 2Ernst E (1997). Colonic irrigation and the theory of autointoxication: a triumph of ignorance over science. Journal of Clinical Gastroenterology. link
  3. 3Handley DV, Rieger NA, Rodda DJ (2004). Rectal perforation from colonic irrigation administered by alternative practitioners. Medical Journal of Australia. link
  4. 4Istre GR, Kreiss K, Hopkins RS, et al. (1982). An outbreak of amebiasis spread by colonic irrigation at a chiropractic clinic. New England Journal of Medicine. link
Related in the handbook (4)
Alternatives
  • โ€” If you just want to empty the bowel, a spoon of psyllium or a $5 laxative does it without the perforation risk.
Related
  • โ€” A colonic won't fix bloating; the actual causes have safer, evidence-based fixes.
  • โ€” Same family of detox marketing โ€” the 'toxins leak from your colon' theory died in the 1930s.
  • โ€” Same 'detox' marketing, same empty promise. Oil-pulling has a small gum benefit; the body-cleanse claims don't.
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