Co2
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What it is
Carbon dioxide (CO2) is a gas naturally found in the atmosphere. It is also produced by living organisms during respiration and by the burning of fossil fuels. For food use, it is typically captured from industrial processes or produced through fermentation.
Why it's used
Carbon dioxide is most often added to beverages to create carbonation, which gives them a fizzy texture and a tangy taste. It can also be used as a propellant in aerosol sprays and as a preservative in modified atmosphere packaging to extend shelf life.
Health notes
In the US, carbon dioxide is generally recognized as safe (GRAS) by the FDA for use in food. It is a natural component of the body and is involved in respiration. International bodies like JECFA have evaluated its safety. At typical consumption levels in carbonated beverages, it is not associated with adverse health effects.
Allergen info
Carbon dioxide is not derived from any of the 9 FDA major allergens. It does not contain gluten.