To better understand the effect of these bacteria on the uterus, the team isolated five Lactobacillus species and tested how they interacted with uterine cells. Unlike probiotics , postbiotics are products of bacterial cells and thus do not contain live bacteria. LG-EPS also reduced signs of aging in artificially aged human uterine cells, improving their ability to support embryo implantation. This pathway was overactive in aged mice and uterine cells, but treatment helped to normalize its activity. Robles said postbiotic treatments could be especially interesting because they may be easier to manufacture than treatments containing live bacteria.