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Name: Robert H.
Status: other
Age: 40s
Location: N/A
Country: N/A
Date: 4/24/2003


Question:
Does drinking carbonated products effect the oxygen in your blood.


Replies:
Very unlikely. Carbonated products are supersaturated solutions of dissolved CO2 in water. As soon as this solution comes into contact with the mouth a large fraction of this dissolved CO2 is liberated by the sudden increase in temperature (gases are less soluble the higher the temperature, the mechanical "swishing" of the carbonated product, and the presence of sites for bubble formation in the mouth. The CO2 that is swallowed is further liberated by the low pH (~ 2-3) in the stomach which further lowers the solubility of CO2. That is why people "burp" sometimes when ingesting carbonated beverages. In addition, other electrolytes in the stomach further reduce the solubility of CO2 in the digestive fluids in the stomach. The only way for CO2 to enter the blood stream is by inhalation. Breathing CO2 enriched air becomes very irritating as the concentration of CO2 in the air increases, due to the formation of carbonic acid in the fluids lining the throat, bronchial tubes, and lungs. So it is not likely that one would breathe CO2 voluntarily for very long. Lastly, the blood is a buffered solution so that it takes substantial concentrations of CO2 to affect the pH significantly.

Vince Calder



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