6Frei B, Englang L, Ames BN. Ascorbate is an out-standing antiox idant in human blood plasma[J]. Proc Natl Acad Sci USA,2008, 105(16) :6377- 6381.
7Inam KV, Rag KG. Five treatment procedures evaluated for the elimination of ascorbate interference in the enzymatic determina- tion of urinary oxalate[J]. Clin Chem,2007,54(6):864-868.
8Marc P. The efficacy of vitamin C supplementationon reducing total serum cholesterol in human subjects: a review and analysis of experimental trial[J]. J chir Med, 2006,5 (1) : 2- 12.
9Gokce N,Keaney JF,Frei B,et al. Long term ascorbic acid admin istration reverses endothelial vasomotor dysfunction in patients with coronary artery disease[J].Circulation, 2008,99(25) : 3234 -3240.
10Ting HH,Timini FK, Boles KS, et al. Vitamin c improves endo thelium-dependent vasodilation in patients with non insulin de pendent diabetes mellitus[J]. J Clin Invest, 1996,97 ( 1 ) : 22-28.
