APP and sarcopenia: Table 1 shows network metrics for major co-occurrence keywords (top 50 based on the weighted degree) in the global network in the studies associated with “inflammation” and “mitochondria.” In addition, in terms of year, 39 published keywords were published in 2020 and are presented in Supplementary Table 1, such as covid-19, microbiome, signal, tau, amyloid beta peptide, antioxidant capacity, stromal cell, sarcopenia, sars-cov-2, blood-brain barrier (BBB), polyunsaturated fatty acid, and gene therapy, etc.