INS and type 2 diabetes mellitus: Similarly, after a supplementation of 45 g per day of freeze-dried blueberry for eight weeks, an improvement of insulin sensitivity of obese, nondiabetic, and insulin-resistant subjects was observed [30], while long-term blueberry supplementation (1 g of blueberry powder per day for 3 months) induced reduction of fasting and 2-h postprandial blood glucose, insulin levels and HOMA-IR in T2D volunteers compared to baseline results [31].