PROBLEM TO BE SOLVED: To provide a food composition of high safety and practicability for preventing periodontal diseases and preventing the advance of periodontal diseases. SOLUTION: This food composition contains an antimicrobial extract such as oil-soluble liquorice extract, soybean isoflavone extract, tea polyphenol extract and the like and high-solubility calcium compound such as a mixture of calcium gluconate and calcium lactate.
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