Natural (l)-menthol purified product, and production method and evaluation method therefor

[Problem] To provide a natural (L)-menthol purified product that eliminates unpleasant tastes and combines a cool sensation and a mint-like aroma, and to provide a production method and an evaluation method for supplying the natural (L)-menthol purified product easily and inexpensively. [Solution] To make a natural (L)-menthol purified product characterized by combining a cool sensation and a mint-like aroma and having a color saturation of 1 or lower as measured by the method described below. (1) A step for vacuum distilling the purified natural (L)-menthol purified product while the purified product is in a heat-melted state and obtaining a vacuum distillation residue. (2) A step for adding ethanol to the vacuum distillation residue obtained in step (1) and obtaining an ethanol solution. (3) A step for making a color difference measurement sample of the ethanol solution obtained in step (2) and assessing the color saturation using a color difference meter that conforms to ISO 7724 (JIS Z 8722).