A serum search was performed at Centro municipality, Tabasco, Mexico. 393 samples were obtained with the aim of determining high density lipoproteins (HDL) values. A Framingham search was also done. 56.7 per cent of females showed values above 65 mg/dl; 15.7 per cent, between 45 and 65; and 27.6 per cent less than 45 mg/dl, with minor, medium and high risks for atherosclerosis, respectively. 56.9 per cent of males showed values above 55 mg/dl; 17.6 per cent between 35 and 55, and 25.5 per cent less than 35, with similar risk levels. In the Framingham search, 67.9 per cent of females showed 4.5 points and 32.1 per cent more than 4.6 for minor and major risk levels, respectively. 70.3 per cent of males obtained less than 5 points and 29.7 more than 5.1, for same risk.