title: Nutrition. Study finds vitamin B12 levels low in some HAART users.
mesh_terms: D000328:Adult; D023241:Antiretroviral Therapy, Highly Active / Q000009:adverse effects*; D018791:CD4 Lymphocyte Count; D005260:Female; D015658:HIV Infections / Q000097:blood / Q000188:drug therapy*; D006801:Humans; D008297:Male; D019562:Viral Load; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D014805:Vitamin B 12