Journal Name:
Nutr Metab Cardiovasc Dis
Article Title:
The effects on serum lipoprotein levels of two monounsaturated fat rich diets differing in their linolenic and alpha-linolenic acid contents
Date Written:
1995
Volume:
5
Number:
Page:
129
Author(s):
Valsta, L.; Jauhiainen, M.; Aro, A.; Salminen, I.; Mutanen, M.
Article:
High oleic oils such as CO and modified sunflower oil differ in their levels of ALA which may result in differences their metabolic effects. This aim of this study was to compare low erucic acid rapeseed oil - CO, with high oleic acid sunflower oil (TriSun oil - SO) in regard to effects on serum lipoproteins. The study comprised two 6 week periods in a crossover randomized design with a 6 week washout period between test diets. Subjects were 40 healthy women and men (age 20-46 years). They consumed their regular diets but replaced fats and fatty foods with experimental oils and products. They were assigned to either a CO diet or high oleic acid sunflower oil (TriSun oil - SO) diet. The CO and SO diets comprised similar proportions of SFA:MUFA:PUFA (11.5:17.5:8.5% of total energy), but differed in their ALA content (2.2 and 0.3%, respectively) and n-6:n-3 ratio (3:1 and 23:1, respectively). Dietary intake was evaluated based on 3- to 7-day food records.
The proportion of ALA in plasma cholesterol esters increased significantly from 0.9% to 1.2% following the CO diet and decreased to 0.4% with the SO diet. Both experimental diets significantly reduced TC by 9.4% and 8.5%, respectively following the CO and SO diets. LDL-C was reduced by 22% after the test diets. TG, LDL-TG and apoB also decreased significantly. No differences were noted in HDL-C or apo-A1, although HDL2 cholesterol was significantly reduced and HDL3 cholesterol increased by both test diets. These changes resulted in a significant reduction in the HDL2:HDL3 ratio of 29% and 38% on the CO and SO diets, respectively. The authors concluded that ALA from CO appears to be equivalent to LA in its hypocholesterolemic effects., , , ,
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