This rapid review is an update of the HEART Helpdesk Report on nutrition interventions in developing and fragile contexts (Bolton, 2014), and focuses on simplified (i.e. separate) protocols used to treat severe and moderate acute malnutrition (SAM and MAM, respectively) in Yemen. The evidence found evaluates these protocols when used in community-based programmes for children aged under 5 years, as well as for pregnant and lactating women (PLW) with a child under 6 months, who have acute malnutrition.