Patent ID: 8492442

Claim:
A method for treating or improving a condition or a disease comprising: administering a medicinal composition, a food, or a drink which contains 75 micrograms or more of a compound represented by the following formula (1): per gram of the composition, the food or the drink, and a pharmaceutically or nutritionally acceptable additive to a subject in need thereof, wherein the compound of formula (1) comprises at least one of D-phenyl lactic acid and L-phenyl lactic acid, wherein an amount of L-phenyl lactic acid contained in the composition, the food, or the drink is higher than an amount of D-phenyl lactic acid, wherein the composition, the food, or the drink has an effect of enhancing parasympathetic nervous activity, and wherein the condition or the disease is one that can be treated or improved by enhancing parasympathetic nervous activity of the subject.