Use of hydroxyoleic acid and its analogous compounds as functional food additives. It describes the use of hydroxyoleic acid and its analogs of general formula I: COOH--CHR--(CH?2#191)?m#191-CH.dbd.CH--(CH?2#191)?n#191-CH ?3#191, in which m and n have, independently, a valur of 0-15 and R can be any residue with molecular weight below 200 Da, in the manufacture and/or preparation of food additives and/or ingredients, dietary products, acceptable food forms and foods in general, focusing on improving parameters related to cardiovascular diseases, such as hypertension and obesity.