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Macronutrient supplementation for people living with HIV/AIDS

Biological, behavioural and contextual rationale

July 2013


Globally, there are an estimated 34 million people infected with HIV and almost 70% of those live in sub-Saharan Africa (1). Weight loss and undernutrition are common in patients with HIV and can accelerate disease progression and increase morbidity and mortality (2). Even after patients start antiretroviral treatment, poor nutritional status is highly predictive of mortality (3,4). In addition to the consequences of food insecurity frequently present in communities affected by HIV, three clinical factors principally contribute to undernutrition in patients with HIV: inadequate intake (due to lack of appetite or difficulties eating due to mouth ulcers), malabsorption (due to diarrhoea or damage to the intestine (5,6) and increased energy expenditure (patients infected with HIV, even if seemingly well and without opportunistic infection, have a resting metabolic rate 10% higher than uninfected adults) (6-10).

Antiretroviral treatment interrupts the replication of HIV and results not only in clinical and immune function improvement but rapid and significant weight gain, provided that the diet contains adequate energy, protein and micronutrients to enable nutritional recovery (11-14). However, reduced body mass index is still predictive of mortality even with antiretroviral treatment, and highlights the value of appropriate nutritional monitoring and support in addition to antiretroviral medications (2). Furthermore, reduced food intake can reduce the efficacy of antiretroviral treatment regimens, as some drugs may not be properly absorbed or can cause significant side effects if not taken with adequate food (15,16).

A review by WHO in 2005 recommended energy intake should be increased by 10% for HIV-infected but asymptomatic patients relative to usual dietary recommendations, and by 20-50% for those recovering from opportunistic infections, keeping the proportion of protein between 12 and 15% of total energy intake, as there is no evidence that higher protein intake is beneficial (17). In settings where food is scarce or the quality of food is poor, it may not be possible to achieve this increase in energy intake without supplementation.

Although there are few studies of the optimal composition of a macronutrient supplement for patients with HIV, nutrition interventions including food packages and macronutrient and/or micronutrient supplements have been successfully integrated into antiretroviral programmes in sub-Saharan Africa (18,19), either through the provision of staple foods or via replacements such as ready-to-use foods (nutrient-dense supplements usually in the form of lipid-based spreads with a range of micronutrients), or corn-soy blends or fortified blended foods (20).

While limited, evidence suggests that those most likely to benefit from macronutrient supplementation are certain populations of undernourished patients with more advanced disease, particularly in settings where food security may be an issue (21,22). Studies among HIV-infected adults in Haiti, Kenya, Malawi and Zambia have demonstrated significant positive effects of macronutrient supplementation on adherence to antiretroviral medication, weight gain and CD4 counts (23,24-26). Other factors to consider include the type, quantity and duration of supplementation, household food security and food sharing, as well as outcomes of interest, such as body weight and clinical measures of HIV infection, and potential effects on economic productivity, comorbidities and quality of life (27). Challenges to the implementation of supplementation programmes include agreeing on exit criteria for stopping supplements, sustainability, avoidance of dependency and equity in communities where food insecurity is also common in the general population. Cost-effectiveness analyses can further help determine which populations are most likely to benefit from supplementation as well as how to organize the distribution of supplements in the most efficient and sustainable manner (28).

Further research on these and other areas is needed to understand the benefits of various supplementation strategies in conjunction with antiretroviral treatment, particularly in settings where HIV infection and food insecurity are widespread and frequently overlap. While population-wide solutions to improve food insecurity and nutritional status of the entire community are relevant, the need for targeted supplementation of HIV-infected individuals may still remain, not only to improve nutritional status but also enhance antiretroviral adherence and outcomes.

* CD4 counts measure the number of CD4 cells or T-helper cells in a person’s blood. CD4 cells are a type of white blood cell that fights infection. Along with other tests used in HIV/AIDS, CD4 counts provide an indication of how strong a person’s immune system is, indicate the stage of disease, guide treatment and predict how the disease may progress.


References

1. UNAIDS report on the global AIDS epidemic. Joint United Nations Programme on HIV/AIDS (UNAIDS). Geneva: UNAIDS; 2012.

2. van der Sande M, Schim van der Loeff MF, Aveika AA, Sabally S, Togun T, Sarge-Njie R, et al. Body mass index at the time of HIV diagnosis: a strong and independent predictor of survival. Journal of Acquired Immune Deficiency Syndrome. 2004; 37:1288-94.

3. Zachariah R, Fitzgerald M, Massaquoi M, Pasulani O, Arnould L, Makombe S, Harries AD. Risk factors for early mortality in patients on antiretroviral treatment in a rural district of Malawi. AIDS. 2006; 22:2291-302.

4. Johannessen A, Naman E, Ngowi BJ, Sandvik L, Matee MI, Aglen HE, et al. Predictors of mortality in HIV-infected patients starting antiretroviral therapy in a rural hospital in Tanzania. BMC Infectious Diseases. 2008; 8:52.

5. Kotler D. Nutritional alterations associated with HIV infection. Journal of Acquired Immune Deficiency Syndrome. 2000; 25 suppl:S81-7.

6. Macallan D, Noble C, Baldwin C, Jebb SA, Prentice AM, Coward WA, et al. Energy expenditure and wasting in human immunodeficiency virus infection. New England Journal of Medicine. 1995; 333:83-8.

7. Hommes M, Romijn JA, Endert E, Sauerwein HP. Resting energy expenditure and substrate oxidation in human immunodeficiency virus (HIV)-infected asymptomatic men: HIV affects host metabolism in early asymptomatic stage. American Journal of Clinical Nutrition. 1991; 54:311-5.

8. Melchior J, Salmon D, Rigaud D, Leport C, Bouvet E, Detruchis P, et al. Resting energy expenditure is increased in stable, malnourished HIV-infected patients. American Journal of Clinical Nutrition. 1991; 53:437-41.

9. Melchior J, Raguin G, Boulier A, Bouvet E, Rigaud D, Matheron S, et al. Resting energy expenditure in human immunodeficiency virus-infected patients: comparison between patients with and without secondary infections. American Journal of Clinical Nutrition. 1993; 57:614-9.

10. Grunfeld G, Pang M, Shimizu L, Shigenaga JK, Jensen P, Feingold KR. Resting energy expenditure, caloric intake and short-term weight change in human immunodeficiency virus infection and the acquired immunodeficiency syndrome. American Journal of Clinical Nutrition. 1992; 55:455-60.

11. Kabue M, Kekitiinwa A, Maganda A, Risser JM, Chan W, Kline MW. Growth in HIV-infected children receiving antiretroviral therapy at a pediatric infectious diseases clinic in Uganda. AIDS patient care and STDs. 2008; 22:245-51.

12. Banerjee T, Pensi T, Banerjee D, Grover G. Impact of HAART on survival, weight gain and resting energy expenditure in HIV-1-infected children in India. Annals of Tropical Paediatrics. 2010; 30:27-37.

13. Koethe J, Lukusa A, Giganti MJ, Chi BH, Nyirenda CK, Limbada MI, Banda Y, Stringer JS. Association between weight gain and clinical outcomes among malnourished adults initiating antiretroviral therapy in Lusaka, Zambia. Journal of Acquired Immune Deficiency Syndrome. 2010; 53:507-13.

14. Diniz L, Maia MM, Camargos LS, Amaral LC, Goulart EM, Pinto JA. Impact of HAART on growth and hospitalization rates among HIV-infected children. Jornal de Pediatria. 2011; 87:131-7.

15. Agnarson A, Ericson J, Ekström AM, Thorson A. Antiretroviral therapy: what about food? AIDS. 2007; 21:1225-6.

16. Au J, Kayitenkore K, Shutes E, Karita E, Peters PJ, Tichacek A, Allen SA. Access to adequate nutrition is a major potential obstacle to antiretroviral adherence among HIV-infected individuals in Rwanda. AIDS. 2006; 20:2116-8.

17. WHO. Macronutrients and HIV/AIDS: a review of current evidence. Geneva, World Health Organization; 2005. (http://www.who.int/nutrition/topics/Paper%20Number%201%20-%20Macronutrients.pdf)

18. Cantrell R, Sinkala M, Megazinni K, Lawson-Marriott S, Washington S, Chi BH, et al. A pilot study of food supplementation to improve adherence to antiretroviral therapy among food-insecure adults in Lusaka, Zambia. Journal of Acquired Immune Deficiency Syndrome. 2008; 49:190-5.

19. The United States President's Emergency Plan for AIDS Relief. Policy guidance on the use of emergency plan funds to address food and nutrition needs. 2006.

20. Koethe J, Chi BH, Megazzini KM, Heimburger DC, Stringer JS. Macronutrient supplementation for malnourished HIV-infected adults: a review of the evidence in resource-adequate and resource-constrained settings. Clinincal Infectious Diseases. 2009; 49(5):787-98.

21. Koethe J, Heimburger D. Nutritional aspects of HIV-associated wasting in sub-Saharan Africa. American Journal of Clinical Nutrition. 2010; 91:1138S-42S.

22. Huis In 't Veld D, Gichunge C, Mzileni O, and Colebunders R. Nutritional supplementation in HIV-infected individuals can be beneficial in certain patient groups. Clinical Infectious Diseases. 2010; 51:1225-6.

23. Ivers L, Chang Y, Gregory Jerome J, Freedberg KA. Food assistance is associated with improved body mass index, food security and attendance at clinic in an HIV program in central Haiti: a prospective observational cohort study. AIDS Research and Therapy. 2010; 7:33.

24. Tirivayi N, Koethe J, Groot W. Clinic-Based Food Assistance is Associated with Increased Medication Adherence among HIV-Infected Adults on Long-Term Antiretroviral Therapy in Zambia. Journal of AIDS and Clinical Research. 2012; 3:171.

25. Ndekha M, van Oosterhout JJ, Zijlstra EE, Manary M, Saloojee H, Manary MJ. Supplementary feeding with either ready-to-use fortified spread or corn-soy blend in wasted adults starting antiretroviral therapy in Malawi: randomised, investigator blinded, controlled trial. British Medical Journal. 2009; 338:b1867.

26. Gichunge C, Hogan J, Sang E, Wafula S, Mwangi A, Petersen T, Komen F, Siika AM. Role of food assistance in survival and adherence to clinic appointments and medication among HIV-infected patients on antiretroviral therapy (ART) in Western Kenya. XVIII International AIDS Conference; 2010; Vienna.

27. Sztam K, Fawzi W, Duggan C. Macronutrient supplementation and food prices in HIV treatment. Journal of Nutrition. 2010; 140 Suppl:213S-23S.

28. Koethe J, Marseille E, Giganti MJ, Chi BH, Heimburger D, Stringer JS. Cost-Effectiveness of Nutrition Supplementation for Malnourished, HIV- infected Adults Initiating Antiretroviral Therapy in Zambia. 19th Conference on Retroviruses and Opportunistic Infections; 2012; Seattle.

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The named authors alone are responsible for the views expressed in this document.

Declarations of interests

Conflict of interest statements were collected from all named authors and no conflicts were identified.