eLife Assessment
This study leverages an impressive and comprehensive longitudinal 16S rRNA gut microbiome dataset from baboons to provide important insight regarding the use of a microbiome-based clock to predict biological age. The evidence for age-associated microbiome features and environmental and social variables that impact microbiome aging is convincing. This study of microbiomes as markers of host age will fuel inquiries and studies and interest a broad range of researchers, especially those interested in alternatives to measuring biological aging.