Novel use of pentapeptide and metabolite thereof in preparation of anti-dementia product

The invention relates to the technical field of biological medicines and in particular relates to a novel use of pentapeptide and metabolite thereof in preparation of an anti-dementia product. Amino acid sequences of the small peptide are as shown in Seq No.1, No.2, No.3, No.4, No.5 and No.6. According to the pharmacological experiment of the alzheimer disease and vascular dementia animal model, the small peptide and the metabolite thereof can be used for remarkably improving the cognitive function of the dementia, so that the small peptide and the metabolite thereof have the effects of preventing the alzheimer disease and vascular dementia, and therefore, the pentapeptide and metabolite thereof can be used for preparing the medicine for preventing senile dementia including the alzheimer disease and vascular dementia.