34.Wedick NM, Pan A, Cassidy A, Rimm EB, Sampson L, Rosner B, Willett W, Hu FB, Sun Q, van Dam RM. Dietary flavonoid intakes and risk of type 2 diabetes in US men and women. Am J Clin Nutr. 2012 Apr;95(4):925-33. http://www.ncbi.nlm.nih.gov/pubmed/22357723
35.Pizziol A, Tikhonoff V, Paleari CD, et al. Effects of caffeine on glucose tolerance: a placebo-controlled study. Eur J Clin Nutr 1998 Nov;52(11):846-9. http://www.ncbi.nlm.nih.gov/pubmed/9846599
36.Moisey LL, Kacker S, Bickerton AC, Robinson LE, Graham TE. Caffeinated coffee consumption impairs blood glucose homeostasis in response to high and low glycemic index meals in healthy men. Am J Clin Nutr. 2008 May;87(5):1254-61. http://www.ncbi.nlm.nih.gov/pubmed/18469247