Fig. 1From: Chronic administration of the probiotic kefir improves the endothelial function in spontaneously hypertensive ratsPhotomicrographs of kefir grains obtained at the unmagnified level (a) and scanning electronic micrographs of the exterior (b–d) and interior (e, f) surface of a kefir grain. The external surface (c, d) shows the prevalence of the bacilli in tight association with a polysaccharide matrix (kefiran). The inside surface shows rod-shaped bacilli growing in association with yeasts (e, f)Back to article page