Does marijuana cause barrett's esophagus?

Not known yet. Marijuana does affect the intestinal tract, which includes the esophagus, stomach, and intestines. It is uncertain if marijuana worsens gastroesophageal reflux (the cause of heartburn and Barrett's esophagus changes), improves GE reflux, or has no effect on reflux. Those who like marijuana say that marijuana improves reflux symptoms, but there is not good research evidence to back up their claims.
Barrett's. This is a change in the esophagus in response to longstanding reflux. It is a precancerous change which requires frequent surveillance EGDs to make sure cancer is not developing. Not caused by marijuana.
No. This makes no sense biologically. People haven't even studied this because it's such a far-fetched idea.

Related Questions

Is barretts esophagus considered an inflamatory condition? Would having barrets with no displasia make CRP level high?

Yes it is Inflammato. It is a type of chronic inflammation caused by chronic irritation. I suppose it can cause the CRP to go up. I would not have done CRP test as it is not a test that helps, yet it can create a lot of anxiety!
Probably not. This pathologist believes that people pay way too much attention to crp. It's often up for no reason, and of course it's a marker for atherosclerosis along with dozens of others. Neither sensitive nor specific for anything, it's not worth troubling yourself over.