Severe acute malnutrition (SAM) refers to a condition characterized by a significant deficit in weight-for-length measurements in children aged 6 to 59 months. It is a crucial public health concern with detrimental effects on child growth, development, and overall well-being. Addressing SAM is crucial to prevent its progression to other childhood morbidity and mortality and to ensure healthy child development. To meet the nutritional requirement of SAM children, icddr,b have come up with a novel intervention named microbiota-directed food (MDF), a ready-to-use therapeutic food. The investigators propose this proof-of-concept trial to establish evidence on the effect of this novel intervention on ponderal growth, microbial and proteomic recovery among the children with SAM in comparison to the standard RUTF.