| 摘要 |
The present invention provides an agent containing Bacillus natto culture extract capable of preventing the agent itself from becoming darker in color, natto-specific odor, and preventing degradation of active ingredients in the Bacillus natto culture extract such as natto-kinase. The present invention also provides effective preservation methods of the Bacillus natto culture extract. To this end, the agent containing Bacillus natto culture extract of the present invention comprises a Bacillus natto culture extract, and any one of a reducing sugar and a reducing sugar derivative. The reducing sugar derivative is preferably the one having no reducing terminal. The invention is particularly effective when used in transparent capsules, because it has an effect of preventing itself from changing in color. Further, a Bacillus natto culture extract preserved such that the extract and any of the reducing sugar and the reducing sugar derivative are mixed therein enables preventing degeneration thereof.
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