“…The genus belongs to the family Veillonellaceae under the order Veillonellales, class Negativicutes, and phylum Firmicutes (Maki and Looft, 2018). Previous studies have demonstrated that M. elsdenii could metabolize lactate and buffer fat and produce acetate, propionate, and butyrate (Chen and Wang, 2016;Chen et al, 2019). These shortchain fatty acids may act through down-regulating cholesterol biosynthesis and increasing the bile acid excretion to regulate the lipid levels (Illman et al, 1988;Marcil et al, 2003;Falcinelli et al, 2015Falcinelli et al, , 2018.…”