人们早已知道饮食对血清类脂(包括胆固醇)有很大影响。在这方面饮食中的多不饱和脂肪与饱和脂肪之比(P/S)是很重要的的。据报道,在六周的干扰期间,当P/S比直从0.15升高到1.22时,血清胆固醇浓度有显著下降。在降低血清胆固醇方面,亚麻酸通常看作是主要的不饱和脂肪酸。通过月见草油(2.4～7.2ml每日)对血清胆固醇浓度的影响的研究表明,浓度下降与剂量有关。其它研究也注意到饮食中的脂肪和P/S比率对血压可能有影响。 People have long known that diet has a great influence on serum lipids (including cholesterol). The ratio of polyunsaturated fat to saturated fat (P/S) in the diet is important. It has been reported that serum cholesterol concentration decreased significantly when the P/S ratio increased from 0.15 to 1.22 during the six-week period of interference. In reducing serum cholesterol, linolenic acid is usually regarded as the main unsaturated fatty acid. A study of the effect of serum cholesterin concentration by evening primrose oil (2.4 to 7.2 ml daily) showed that the decrease in concentration was dose-related. Other studies have also noted that dietary fat and P/S ratios may have an effect on blood pressure.