Methods: We will perform a randomized parallel controlled clinical trial in seropositive HIV patients from 20 to 55 years old on clinical score A1, A2, B1 or B2 who received HAART. They will be randomly assigned to receive omega 3 fatty acids 2.4 g (Zonelabs, Marblehead MA) or placebo for 6 months. At baseline anthropometric measurements, lipid profile, glucose and stress oxidative levels (nitric oxide, malondialdehyde, total glutathion, and lipid peroxidation products) will be evaluated.