PROBLEM TO BE SOLVED: To provide novel L-ascorbic acid preparations exerting sustained-release ability in the presence of water such as foods or in heat conditions, and to provide production methods thereof.SOLUTION: Provided are an L-ascorbic acid preparation in which L-ascorbic acid or a salt thereof is coated with at least one long chain fatty acid metal salt with a melting point of 100°C or more and a production method of the L-ascorbic acid preparation comprising contacting at least one long chain fatty acid metal salt with a melting point of 100°C or more at the time of powdery or granular state, with powdery or granular L-ascorbic acid or a salt thereof, at a temperature less than the melting point of the long chain fatty acid metal salt to coat the L-ascorbic acid or a salt thereof with the long chain fatty acid metal salt.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】食品等の水の存在下や加熱条件下において徐放性の性能を示す新規なL-アスコルビン酸製剤及びその製造方法を提供すること。【解決手段】融点が100℃以上の長鎖脂肪酸の金属塩の少なくとも1種によりL-アスコルビン酸又はその塩が被覆されているL-アスコルビン酸製剤、及び粉末状又は顆粒状の融点が100℃以上の長鎖脂肪酸の金属塩の少なくとも1種と、粉末状又は顆粒状のL-アスコルビン酸又はその塩とを、前記長鎖脂肪酸の金属塩の融点未満の温度で接触させ、前記L-アスコルビン酸又はその塩を前記長鎖脂肪酸の金属塩で被覆する工程を含むL-アスコルビン酸製剤の製造方法である。【選択図】なし
