Nutrition support in refugee settings is a cornerstone of public health because forced displacement rapidly disrupts food systems, sanitation, and access to healthcare—conditions that together drive malnutrition and its downstream effects on immunity, growth, and cognitive development. The core medical challenge is not only inadequate caloric intake, but also micronutrient deficiencies and protein-energy imbalance that impair physiologic resilience. In humanitarian contexts, malnutrition is clinically relevant because it increases susceptibility to infectious diseases (e.g., diarrhea, respiratory infections), worsens disease severity, and elevates mortality risk—especially among children under five, pregnant and lactating people, and individuals with chronic illness.
Malnutrition is typically framed as a spectrum: wasting (acute weight loss reflecting recent inadequate intake or illness), stunting (chronic undernutrition affecting linear growth), underweight, and micronutrient deficiencies such as iron deficiency anemia, vitamin A deficiency, and zinc deficiency. Mechanistically, protein-energy malnutrition reduces lean body mass and alters hepatic synthesis of proteins involved in immune function. It also impairs adaptive immunity by reducing lymphocyte proliferation and antibody responses. At the mucosal level, malnutrition compromises gut barrier integrity, promoting bacterial translocation and inflammatory cascades, which can exacerbate diarrhea and lead to a self-perpetuating cycle of malnutrition and infection. Micronutrient deficits further alter enzymatic pathways, oxygen transport, and oxidative defense.
Infections commonly coexist with nutritional deficits in displacement settings. Diarrheal illness both results from and worsens malnutrition by reducing nutrient absorption and increasing losses. Respiratory infections raise metabolic demands and can reduce appetite, while fever accelerates catabolism. The combination of stress, disrupted sleep, and limited healthcare access contributes additional physiologic strain. For pregnant individuals, inadequate intake increases the risk of low birth weight and maternal complications, while for infants and young children, early-life undernutrition can have lasting neurodevelopmental consequences through disrupted synaptogenesis, myelination, and neurotransmitter regulation.
Nutrition support programs therefore aim to restore adequate intake, correct micronutrient deficiencies, and prevent deterioration. Evidence-based interventions typically include targeted supplementary feeding for moderate acute malnutrition, therapeutic feeding for severe acute malnutrition, and general food assistance to households to reduce the risk that vulnerable members slip into crisis. Therapeutic foods are formulated to deliver high energy density and a nutrient profile optimized for recovery while being safe and feasible in field conditions. For severe cases, protocols often incorporate clinical screening for medical complications such as dehydration, hypoglycemia, infection, and electrolyte imbalance, because refeeding without stabilization can be dangerous. Refeeding syndrome is a known risk in severely malnourished individuals due to shifts in phosphate, potassium, and magnesium; though protocols vary by context, careful monitoring and gradual nutritional rehabilitation are best practice.
Micronutrient interventions are integral. Iron deficiency anemia impairs cognitive function and immune defense; however, iron supplementation must be managed thoughtfully because iron availability can affect certain pathogens. In high-burden settings, program design often coordinates iron with infection control measures and may rely on balanced supplementation strategies. Vitamin A supplementation has established benefits for preventing morbidity and mortality in deficiency states. Zinc supplementation reduces duration and severity of diarrhea in children, and folate and B-vitamin complexes support hematologic recovery.
A major clinical reality is that nutrition support must be integrated with broader health measures. Safe water, sanitation, hygiene promotion, and access to rapid treatment for acute infections are essential to break the nutrition-infection cycle. Vaccination coverage and deworming can also reduce infectious burden. Malnutrition screening—using anthropometric measures such as mid-upper arm circumference and weight-for-height indices—enables risk stratification and referral to therapeutic services. Growth monitoring for children and regular assessment of pregnant and lactating people helps detect early decline.
Operationally, nutrition interventions are most effective when they are timely, equitable, and designed around household realities. Displacement often limits cooking fuel and safe storage; fortified blended foods or ready-to-use products can mitigate these barriers. Counseling on infant and young child feeding (including breastfeeding support and appropriate complementary feeding) is critical because nutrition outcomes depend on both supply and feeding practices. Psychosocial stress can indirectly affect feeding frequency and caregiving capacity, amplifying nutritional risk.
Overall, nutrition support in refugee settings is a medically grounded strategy to reduce morbidity and mortality driven by malnutrition and its interaction with infection. By restoring energy and protein adequacy, correcting micronutrient deficiencies, and integrating therapeutic protocols with infection prevention and clinical monitoring, such interventions protect immune function, enable growth and neurodevelopment, and improve health trajectories for displaced families.
Source: WFP Tanzania (World Food Programme Tanzania) — Jun 20, 2026.
WFP Tanzania: Happy #WorldRefugeeDay! In Tanzania, WFP is supporting 100,000 refugees with life-saving food assistance and nutrition support, helping families like Nkundana’s meet their essential needs, protect their health and well-being, and build a brighter future. #ZeroHunger. #breaking
— @WFP_Tanzania May 1, 2026
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