How's your microbiota? Let's check your urine

Abstract

In this issue of Blood, Weber and colleagues demonstrate that in the first 10 days following allogeneic hematopoietic transplantation, urinary 3-indoxyl sulfate is a biomarker of intestinal microbiota health and predicts reduced intestinal graft-versus-host disease (GVHD) and treatment-related mortality, as well as improved overall survival.