Particularly, citric acid, malic acid, and adipic acid are preferable from the viewpoints that the buffering capacity is high, and that the aqueous carbonated beverage hardly
turns into a gel before drunken. An amount thereof in the
5 beverage is 0.001 to 5 w/v%-, more preferably 0.01 to 2 w/v%
from the viewpoints of buffering capacity and
administration easiness. Moreover, for the production
within the above-described pH range, a preservative may
be blended as necessary. Particularly, the preservative
10 is preferably benzoic acid and benzoic acid salts such as
sodium benzoate, and an amount thereof in the beverage is
0.001 to 0.5 w/v%, more preferably 0.005 to 0.1 w/v96 from the viewpoints of storability and administration easiness