Hi
@WoolPippi I found your comment on this old thread enlightning: Why do you get nausea if you take too little betaine hcl? I have this, rarely, too
. I have a lack of stomach acid, and I want to find out the cause. That is why I am so interested.
Now, a typical cause of nausea is: histamine. Thats why people take antihistamines for sea sickness. Then, here is the
diagramm posted by
@heyitisjustin
View attachment 18625
Looking at this diagramm, this nausea in us could mean: The body pushes more histamine, trying to get out some action of that parietal cell. And some of this histamine will spill over from the stomach to the circulation. If so, histamine could be measured there.
Now, does this make sense? Is pre-/postprandial histamine in blood a test if issues lay within the parietal cell ?
This paper says that after a meal, histamine does normally not increase (in dogs, but I assume this to be the same in man). ➞ If there is an increase in histamine, it is pathological. Now, assume we measure such an increase. Do we know the histamine comes from gastric acid secretion (or failed attempt thereof) in the stomach? Now, if so, it should follow the course of gastric acid and gastrin secretion, that is, peak at the end of the meal and return to baseline later. So the measurement would be:
- Test histamine in blood fasting
- Test histamine in blood at the end of the meal (if there is an increase, it is pathological)
- Test histamine in blood some time after (to make sure all this follows the curve of stomach acid and gastrin)
Now, test 2 and 3 have been executed in
this study. It is the only such study I have found. It seems to confirm the idea of histamine in blood going up and then down. In teenagers with constipation they found that histamine goes down 30 min after a meal and stays there:
View attachment 18626
So, why could this confirm (or is at least not opposed to) the idea of histamine going up and down in an attempt to produce stomach acid?
- I consider it unlikely that 30 min after a meal, some histamine-eating enzyme would be produced in increased quantities (not impossible though, so test for DAO). The more likely explanation is, that there is indeed a postprandial increase in blood histamine, peaking at the end of the meal. In these patients, this is 45% higher than baseline, and it returns to baseline 30 minutes after the end of the meal. (Unfortunately all data comes from patients, there is no healthy control group)
- These patients have constipation, which fits well with dysbiosis (motility is the body's best defense against dysbiosis. And bacteria secrete substances to inhibit peristalsis, thus improve their survival in the host). Now, low stomach acid means lack of desinfection of incoming food, that is, dysbiosis.
➞ Conclusion: There is a chance that the above three tests would be instrumental to diagnose if there is excessive histamine production caused by the body's attempt to get out gastric acid of the parietal cell. An increase greater zero would indicate pathology. If
this test for pre-/postprandial increase in stomach acid production shows zero (as it does in me), but histamine goes up at the end of the meal, then more likely than not, the culprit for lack of meal-induced increase of stomach acid production is in the parietal cell. (I will, however, add a DAO test − the enzyme for degrading histamine).
If anyone finds an adult study on postprandial histamine including a healthy population, that would be great. I have invested hours to try to find something... Though, there was an
old Italian study on postprandial histamine, but I cannot just run to an Italian library right now
Any Italian here?
).
(To exclude other causes of lack of stomach acid:
here is the gastrin test and the gastroscopy I had so far.)
I am determined not to spend the rest of my life on betaine hcl. Tried everything under the sun to improve, had some success here and there for a while, but in sum, I failed. Now searching for causes, which no doctor was able to do for me...