The invention aims to disclose a special dietary preparation based on alpha-
ketoglutaric acid as well as a preparation process and application thereof, and relates to the technical field of dietary supplements. Every 800 mg of the dietary preparation comprises 50 mg to 100 mg of alpha-
ketoglutaric acid or alpha-
ketoglutaric acid salt, 5 mg to 12 mg of N-acetylneuraminic acid or N-acetylneuraminic
acid salt, 30 mg to 60 mg of
ergothioneine, 100 mg to 150 mg of a desert
cistanche deserticola water extract or 50 mg to 80 mg of desert
cistanche deserticola total glycosides, and auxiliary materials. The alpha-ketoglutaric
acid salt is any one or more of alpha-ketoglutaric acid
calcium, alpha-ketoglutaric acid
sodium and alpha-ketoglutaric acid
magnesium; the N-acetylneuraminic
acid salt is any one or more of N-acetylneuraminic acid
calcium, N-acetylneuraminic acid
sodium and N-acetylneuraminic acid
magnesium; the special dietary preparation has the beneficial effects that the special dietary preparation simultaneously contains alpha-ketoglutaric acid or alpha-ketoglutaric acid salt, N-acetylneuraminic acid or N-acetylneuraminic acid salt,
ergothioneine and the
cistanche deserticola
aqueous extract, and has the effects of delaying
senescence, resisting fatigue, improving the symptom of
kidney-
yang deficiency and enhancing
immunity for males aged more than 45 years old.