Alterations in plasma lipid concentrations in normal and hyperlipidemic patients with morbid obesity before and after jejunoileal bypass.

In a study of 193 massively obese patients plasma lipoprotein concentrations were elevated in 94 patients and were within normal limits in 99 patients. Jejunoileal bypass, in addition to causing weight loss, lowered plasma lipids in both groups to normal or below normal levels.