However, the compositions have to be taken in a large amount
in the form of powder or tablet, and therefore have a problem
of administration difficulty. Moreover, when these
compositions are dissolved in water, the resulting
10 solutions exhibit an alkalinity due to the influence of
the gas generating substance. Hence, there are problems
that the storability as a beverage is poor, and a beverage obtained by dissolving such a powder has a taste with a low palatability.