Through several ongoing epidemiologic studies, he has been interested in clarifying epidemiology and risk factors for insulin resistance, diabetes mellitus, and anthropometric changes in HIV-infected patients and their relationship to antiretroviral therapy. In addition, he is also actively involved in multiple studies evaluating novel treatments for the metabolic and skeletal abnormalities in HIV-infected patients, including the use of complementary and alternative medicines. He is also interested in novel treatments of obesity in non-HIV infected populations and their effect on regional body composition and metabolism.