e-Library of Evidence for Nutrition Actions (eLENA)

Interventions by Category

Interventions are placed into one of three categories depending on the level of guidance and supporting evidence.

Category 1 interventions are supported by guidelines that have been recently approved by the WHO Guidelines Review Committee (GRC). Category 1 interventions also include those supported by recommendations and other forms of guidance that have been adopted or endorsed by the World Health Assembly.

Category 2 interventions are interventions for which there are high-quality systematic reviews, but guidelines that have been recently approved by the WHO Guidelines Review Committee are not yet available.

Category 3 interventions are innovative interventions that have been researched, but do not yet have supporting systematic reviews and are not currently ready for scaling up.

WHO recommendations include both Category 1 and Category 2 interventions.

Category 1

Category 2

Category 3

Contact us

eLENA team
Department of Nutrition for Health and Development (NHD)
World Health Organization
20 Avenue Appia
CH-1211 Geneva 27
Switzerland

E-mail: nutrition@who.int