Based on that, MOR has been shown to have multiple biological activities, including anti-depression [2,3,4,5], anti-inflammation [6,7], anti-osteoporosis [8,9,10], anti-fatigue [11], anti-Alzheimer’s disease (AD) [12,13,14], anti-oxidation [11,15,16], immune-regulation [17,18], pro-fertility [19,20,21], anti-radiation [21,22], regulation on gut microbiota [15,23,24], etc. The content of saccharides in MOR was reported to be 49.79–58.25% [12], and polysaccharides are the main active substances of MOR. This evidence concerns the gene OPRM1 and Alzheimer disease.