Objective: To investigate the change of plasma free fatty acids (FFA),fatty acid composition and the relationship between FFA,fatty acid composition and insulin resistance (IR) in patients with impaired glucose tolerance and type 2 diabetes mellitus.

• 目的：研究糖耐量减低和2型糖尿病患者血中游离脂肪酸(free farty acids，FFA)和脂肪酸谱的变化，并对FFA水平及脂肪酸类型与胰岛素抵抗(insulin resistance，IR)之间的关系进行初步探讨。