Ganji V, Kies C V
Department of Human Biology, University of Wisconsin-Green Bay 54311.
Eur J Clin Nutr. 1994 Aug;48(8):595-7.
The effects of psyllium fibre supplementation to polyunsaturated fatty acid rich soybean oil and saturated fatty acid rich coconut oil diets on fat digestibility and faecal fatty acid excretion were investigated in healthy humans. The study consisted of four 7-day experimental periods. Participants consumed soybean oil (SO), soybean oil plus psyllium fibre (20 g/day) (SO+PF), coconut oil (CO) and coconut oil plus psyllium fibre (20 g/day) (CO+PF) diets. Laboratory diet provided 30% calories from fat (20% from test oils and 10% from basal diet), 15% calories from protein and 55% calories from carbohydrate. Fat digestibility was significantly lower and faecal fat excretion was significantly higher with SO+PF diet than SO diet and with CO+PF diet than CO diet. Faecal excretion of myristic and lauric acids was not affected by test diets. Percent faecal palmitic acid excretion was significantly higher during psyllium supplementation periods. Higher faecal linoleic acid excretion was observed with soybean oil diets compared with coconut oil diets. Increased faecal fat loss, decreased fat digestibility and increased faecal palmitic acid excretion with psyllium supplementation may partly explain the hypocholesterolaemic action of psyllium fibre.
在健康人群中研究了补充车前子纤维对富含多不饱和脂肪酸的大豆油饮食和富含饱和脂肪酸的椰子油饮食的脂肪消化率及粪便脂肪酸排泄的影响。该研究包括四个为期7天的实验阶段。参与者分别食用大豆油（SO）、大豆油加车前子纤维（20克/天）（SO+PF）、椰子油（CO）和椰子油加车前子纤维（20克/天）（CO+PF）饮食。实验室饮食提供30%的热量来自脂肪（20%来自测试油，10%来自基础饮食），15%的热量来自蛋白质，55%的热量来自碳水化合物。与SO饮食相比，SO+PF饮食的脂肪消化率显著降低，粪便脂肪排泄显著增加；与CO饮食相比，CO+PF饮食的情况相同。肉豆蔻酸和月桂酸的粪便排泄不受测试饮食影响。在补充车前子期间，粪便中棕榈酸排泄百分比显著更高。与椰子油饮食相比，大豆油饮食的粪便亚油酸排泄更高。补充车前子导致粪便脂肪损失增加、脂肪消化率降低以及粪便棕榈酸排泄增加，这可能部分解释了车前子纤维的降胆固醇作用。
