The colon is the final section of the large intestine, responsible for water and electrolyte absorption from digestive waste and the elimination of fecal matter. Barbara O'Neill addresses colon health in some of her most watched lectures, connecting colon function to overall health through the lens of accumulated waste and intestinal permeability. The colon-skin connection is real, documented, and more significant than conventional dermatology typically acknowledges.
The Colon-Skin Axis
The colon houses the majority of the gut microbiome — approximately 100 trillion microorganisms whose metabolic activity produces short-chain fatty acids, vitamins, and signaling compounds that affect virtually every system in the body including skin. The colon also eliminates the bile-bound toxins, hormones, and waste products that the liver has processed and packaged for excretion.
When colon transit time is slow — from inadequate fiber, dehydration, sedentary lifestyle, or dysbiosis — these bile-bound compounds sit in the colon longer, allowing bacterial enzymes to deconjugate them and permit reabsorption. This enterohepatic recirculation means compounds the liver processed and eliminated return to circulation, increasing the toxic and hormonal burden that eventually reaches skin.
This is the mechanism behind the clinical observation that constipation is associated with worse acne and inflammatory skin conditions in many patients — the deconjugated hormones and toxins that reabsorb from a slow colon contribute to the hormonal and inflammatory load that drives these conditions.
Barbara O'Neill on Colon Cleansing
O'Neill's colon health teaching emphasizes dietary fiber as the non-negotiable foundation — specifically from whole plant foods rather than fiber supplements in isolation. She recommends 30 to 40 grams of dietary fiber daily from vegetables, fruits, legumes, and whole grains, well above the average Western intake of 12 to 15 grams.
She addresses periodic colon cleansing through herbal laxatives and enemas for people with significant constipation or accumulated waste. Her recommended herbs for colon support include cascara sagrada, senna, and aloe vera (in small amounts as a bowel stimulant) — all traditional colon-stimulating herbs with documented mechanisms.
The Microbiome Connection
As discussed in our probiotics article, colon microbiome composition directly affects skin through the gut-skin axis. The short-chain fatty acids produced by healthy fiber-fermenting bacteria in the colon — butyrate, propionate, acetate — reduce systemic inflammation that manifests in skin. Dysbiotic colon microbiomes with reduced diversity produce less of these beneficial metabolites and more of the bacterial components that drive systemic inflammatory burden.
Dr. Sebi's emphasis on mucus-free plant foods for colon health reflects the fiber provision that supports the beneficial bacteria producing anti-inflammatory short-chain fatty acids. Whatever the theoretical framework, the practical dietary recommendation — more fiber from whole plant foods — is exactly what the gut-skin axis research supports.
Natural Soap and the Colon Connection
The colon connection to natural soap is indirect but consistent with the overall chemical burden framework. Synthetic chemicals absorbed through skin add to the metabolic waste that the colon eventually eliminates after liver processing. Reducing this daily chemical input from personal care reduces one stream of the total body burden that colon elimination must handle.
Additionally, the filtered shower water that reduces chlorine absorption is specifically relevant to colon health: ingested chlorine from drinking water affects gut microbiome composition, and transdermal chlorine absorption during showering represents an additional exposure route. The holistic approach reduces chemical burden from all directions simultaneously.
Beyond Clean, Beyond Ordinary.