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American Journal of Clinical Nutrition, Vol 40, 1165-1174, Copyright © 1984 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Effects of guar gum on plasma lipoproteins and apolipoproteins C-II and C-III in patients affected by familial combined hyperlipoproteinemia

O Bosello, L Cominacini, I Zocca, U Garbin, F Ferrari and A Davoli

In recent years, guar gum has been shown to be a potent hypocholesterolemic agent. The effects of this fiber on triglycerides are less clear. In order to evaluate the influence of guar supplementation on plasma lipoproteins and apolipoprotein C-II (apoC- II) and apolipoprotein C-III (apoC-III) isoforms (apoC-III2, apoC-III1, apoC-III0), 16 g/day of guar gum were administered to 12 outpatients affected by familial combined hyperlipoproteinemia for a period of 60 days. Mean total cholesterol and triglyceride levels significantly decreased after 15 days of treatment and persisted reduced at the 30th and 60th day of guar supplementation. While low-density lipoprotein cholesterol paralleled the reduction of total plasma cholesterol, we did not observe any change in the cholesterol content of high-density lipoprotein (HDL) subfractions (HDL2 and HDL3) during the study. A redistribution of the relative content of very low-density lipoprotein apoC-III isoforms with a significant increase of apoC-III1 and a decrease of apoC-III0 was observed after 15, 30, and 60 days of guar gum administration. The results show that guar gum reduces not only cholesterol but also triglyceride levels in patients affected by familial combined hyperlipoproteinemia. Further studies are needed to confirm the suggestion that the different distribution of very low- density lipoprotein apoC-III isoforms induced by guar supplementation may influence the behavior of plasma triglycerides.


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