APP and Alzheimer disease: Oligosaccharides from Morinda officinalis (OMO) are effective in alleviating AD by improving gut microbiota based on their capacity in increasing the abundance of Lactobacillus, Allobaculum, Lactobacillaceae, and Lachnospiraceae in APP/PS1 transgenic mice, indicating their prebiotic role in AD animal models (Xin et al., 2018).