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The main regulatory input into erythrocyte production is hypoxia. The response to elevated CO2 levels in the blood (hypercapnia) is mainly to increase ventilation (i.e. more and/or deeper breaths) so that the excess can be "blown off". I think that some carbon dioxide could pass into the bloodstream from the stomach since gases tend to be quite good at ...


Answer: No. How should the CO$_2$ from you stomach get into your blood? And: Most of the CO$_2$ is removed (by burping) from the solution in your stomach anyway due to the conditions there.

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