Can Kissing Affect Your Gut Bacteria and Digestion?

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Discussion Overview

The discussion revolves around the question of whether kissing can influence gut bacteria and digestion, exploring the potential for changes in gut flora due to oral contact. Participants consider the implications for weight change and reference related observations in lab experiments with mice and infants.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that gut flora should not change due to kissing, as oral flora and gastrointestinal (GI) flora are distinct and do not interchange.
  • One participant mentions that the majority of GI flora consists of bacteriodies species, while oral flora is primarily alpha hemolytic streptococcus species.
  • Another participant shares an anecdote about witnessing a drunk individual kiss someone shortly after vomiting, questioning the implications for bacterial transfer.
  • Further elaboration is provided on the compartmentalization of the GI tract, noting that the cardiac and pyloric sphincters prevent the backflow of GI contents into the mouth under normal circumstances.
  • Concerns are raised about the potential consequences if flora from one compartment of the GI tract were to enter another, emphasizing the specialized nature of different GI regions.

Areas of Agreement / Disagreement

Participants generally agree that GI bacteria should not be affected by kissing, but there are anecdotal challenges and nuances regarding the mechanics of the GI tract and bacterial transfer that remain unresolved.

Contextual Notes

The discussion highlights assumptions about the separation of oral and GI flora, the role of anatomical structures in preventing bacterial transfer, and the implications of anecdotal evidence, which may not be universally applicable.

Gerenuk
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Basically the question is:
Can your gut flora change slightly by kissing a lot?
Will it have an effect on your digestion?

Can you change weight because of this?

It kind of works in lab experiments with mice and it exists for babies.
 
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No, your GI bacteria shouldn't change with kissing. You oral flora (your mouth) and your GI flora are different flora and your GI flora shouldn't be coming up through your mouth. The vast majority of your GI flora is bacteriodies species (anaerobic bacteria), while in your mouth its mostly alpha hemolytic streptococcus species.
 
bobze said:
No, your GI bacteria shouldn't change with kissing...your GI flora shouldn't be coming up through your mouth.
It shouldn't but only the other night I had the pleasure of seeing a drunk man throw up in the street before immediately kissing his drunk girlfriend...
 
Ryan_m_b said:
It shouldn't but only the other night I had the pleasure of seeing a drunk man throw up in the street before immediately kissing his drunk girlfriend...

Gross! That made me want to wipe mouth out, lol.

On a more serious note, even after emesis I don't think the bacteria should be passing from your GI back to your mouth.

Your GI is wonderfully segmented and compartmentalized. Blocking off your stomach from your esophagus is your cardiac (lower esophageal) sphincter. Then blocking off your stomach from your SI is your pyloric sphincter. During emesis your cardic sphincter opens allowing stomach contents to be ejected. In a healthy person your pyloric sphincter should not be opening allowing passage of material from the SI up the tract. This can happen in unhealthy people when they have pyloric stenosis. There is a good reason that the areas of your GI are so quarantined. The flora from your mouth, esophagus, stomach (not that it has much flora), SI, LI and colon have different flora and compositions of flora. As well as having different pHs of content that passes between them and having specialized epithelium that deals with specific pHs. When flora from one specific compartment gets into the incorrect compartment it can cause problems.
 
bobze said:
Gross! That made me want to wipe mouth out, lol.
It did put me off my burger lol
bobze said:
On a more serious note, even after emesis I don't think the bacteria should be passing from your GI back to your mouth...
Ah interesting. Thanks Bobze :smile:
 

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