Malnourished adult ART and pre-ART clients at six clinical sites in Kenya are randomly allocated either to a group that receives nutrition counseling only or a group that receives nutrition counseling and supplementary feeding for six months. All patients continue to receive medical treatment (ART and other medicine) according to their condition. Baseline measures of socioeconomic and demographic status are collected. Measures of both nutritional and non-nutritional clinical outcomes are collected at baseline, 3, 6, 9, and 12 months. Clients beginning ART are treated as one arm and randomized between food and non-food, and clients not yet eligible for ART (pre-ART) are treated as a second arm and randomized between food and non-food. Within each arm, outcomes of subjects receiving supplemental food will be compared with outcomes of those who are not.