To obtain a healthy dietary supplement having an excellent detoxifying effect on a hangover, by blocking a step in which alcohol is changed into acetaldehyde in case of too much drinking the alcohol, so as to produce the excellent detoxifying effect in case of ingesting the alcohol.

This healthy dietary supplement effective for preventing and mitigating the hangover is prepared by adding a supplementary component in a small amount to a main component, further adding a vehicle thereto, and coating the components with a food brightening agent, wherein the main component is composed of calcium phosphate dihydrate, stearic acid, pyridoxine hydrochloride, thiamine hydrochloride, and nicotinic acid, the supplementary component is composed of cyanocobalamin, milk thistle, garlic, ginger, royal jelly, and broccoli, and the vehicle comprises cellulose. The supplement decomposes the alcohol at a high speed, by the detoxifying effect, converts the alcohol into energy, blocks the step in which the alcohol is changed into the acetaldehyde, immediately when activity of mitigating the hangover is lowered or when the alcohol is too much drunk, produces the excellent detoxifying effect, when the alcohol is ingested, and extremely enhances the mitigating effect on the hangover.