HIV and Nutrition Interactions

HIV and nutrition interactions concern the bidirectional relationship between HIV infection and nutritional status. HIV increases energy requirements and can cause wasting and micronutrient depletion, while poor nutritional status is associated with faster disease progression and worse outcomes. The relationship is a prominent example of the nutrition-infection synergism applied to a chronic immune-targeting infection.

Definition

HIV and nutrition interactions refer to the mutually reinforcing relationship between HIV infection and nutritional status, in which the infection degrades nutritional status and impaired nutrition is associated with accelerated disease progression and mortality.

Scope

The topic covers how HIV affects nutritional status (through wasting, malabsorption, raised metabolic demand, and altered micronutrient levels) and how nutritional status in turn relates to disease progression and survival. It also notes the evidence on micronutrient supplementation in HIV. The treatment is mechanistic and reference-oriented and does not constitute clinical or dietary advice.

Key concepts

• HIV-associated wasting
• Increased energy requirements in HIV
• Micronutrient depletion (e.g. selenium, vitamin A)
• Nutritional status and disease progression
• Multivitamin supplementation evidence
• Nutrition-infection synergism in chronic infection

Mechanisms

HIV infection degrades nutritional status through several routes: reduced food intake, malabsorption, chronic immune activation, and increased resting energy expenditure, which together can produce weight loss and wasting and deplete micronutrient stores. Impaired nutritional status, conversely, is associated with weakened immune function and faster clinical progression, consistent with the general nutrition-infection synergism. Randomised evidence indicates that multivitamin supplementation can slow HIV disease progression in some populations, and reviews have examined the role of individual micronutrients such as selenium in the course of infection.

Clinical relevance

The interaction between HIV and nutrition helps explain why nutritional status is monitored as part of HIV care and why nutrition has featured in public health responses to the epidemic. The content summarises mechanisms and trial-level evidence at a reference level; it is not a source of dosing recommendations, dietary prescriptions, or individualised treatment guidance.

Epidemiology

The nutrition-HIV interaction is most consequential in settings where HIV prevalence and food insecurity overlap, particularly in sub-Saharan Africa. In such contexts wasting and micronutrient deficiency are common among people living with HIV, and trials such as Fawzi and colleagues' multivitamin study were conducted to test whether improving micronutrient status alters disease trajectory.

History

Wasting was recognised as a defining feature of advanced HIV disease early in the epidemic, prompting interest in whether nutritional interventions could influence outcomes. Through the late 1990s and 2000s, randomised trials of micronutrient supplementation, including the multivitamin trial reported by Fawzi and colleagues in 2004, tested this hypothesis directly, and reviews subsequently synthesised the evidence on individual nutrients and on the broader nutrition-HIV relationship.

Key figures

• Wafaie Fawzi
• Nevin Scrimshaw
• Peter Katona

Seminal works

• fawzi-2004
• stone-2010
• scrimshaw-1997

Frequently asked questions

How does HIV affect nutritional status?

HIV can reduce food intake, impair nutrient absorption, and raise energy expenditure through chronic immune activation, which together may lead to weight loss, wasting, and depletion of micronutrient stores.

Does improving nutrition change HIV outcomes?

Some randomised trials, such as Fawzi and colleagues' multivitamin study, found that supplementation slowed disease progression in certain populations, but this entry reports such evidence at a reference level and is not a basis for individual supplementation or treatment decisions.