A manufacturing method of an ascorbic acid dispersion material includes a heating step of adding an ascorbic acid into a solvent including one or more selected from the group consisting of glycerin, diglycerin, polyglycerin represented by a following formula, and propylene glycol, and heating the ascorbic acid to a predetermined temperature to dissolve the ascorbic acid； a cooling step of cooling a solution with the ascorbic acid dissolved therein at a cooling rate of 5 to 20° C./min until a temperature of the solution reaches 35 to 50° C. to remove heat from the solution； and a growth step of storing the solution after completion of the cooling step at 27 to 38° C. for a predetermined period to promote crystal growth so that the ascorbic acid crystal has a flat plate shape, a thickness of 0.05 to 3 μm, and an average particle diameter of 50 to 100 μm.
