Nicotine makes you poop because it acts as a stimulant on the digestive system, specifically by activating the parasympathetic nervous system (PNS) which controls gut motility. When nicotine enters the bloodstream, it binds to receptors that trigger the release of neurotransmitters and hormones stimulating intestinal contractions and speeding up the movement of waste through the colon, often creating a sudden urge to defecate.
How Nicotine Affects Digestion
- Nicotine boosts gut motility by increasing intestinal muscle contractions (peristalsis), propelling food and waste faster through the digestive tract.
- It activates the enteric nervous system, known as the "gut's brain," which controls digestion.
- Nicotine also influences gastrointestinal hormones that regulate digestion, contributing to a laxative-like effect.
Mechanism Behind the Urge to Poop
- Nicotine stimulates the parasympathetic nervous system (PNS), responsible for "rest and digest" functions.
- This stimulation relaxes sphincter muscles and increases bowel movement frequency.
- The effect can be likened to how caffeine stimulates bowel activity, though the intensity varies per individual.
Additional Notes
- Cigarette smoke contains other chemicals that impact the gut microbiome and can cause inflammation, which further influences bowel habits but is not the direct effect of nicotine.
- Nicotine in forms such as pouches or gum similarly triggers bowel movements by the same mechanisms.
In summary, nicotine's role as a stimulant on the nervous system and intestines is why many people experience an increased urge to poop after using it. This effect varies by person and nicotine product used.
