Daily consumption of banana marginally improves blood glucose and lipid profile in hypercholesterolemic subjects and increases serum adiponectin in type 2 diabetic patients

In this study, we explored the effects of consumption of banana in thirty hypercholesterolemic and fifteen type 2 diabetic subjects. They were given a daily dose of 250 or 500 grams of banana for breakfast for 12 weeks. Fasting serum lipid, glucose and insulin levels were measured initially as well as every 4 weeks. Daily consumption of banana significantly lowered fasting blood glucose (from 99 +/- 7.7 to 92 +/- 6.9 and 102 +/- 7.3 to 92 +/- 5.7 mg.dL(-1) (p<0.05) after consuming banana 250 or 500 g/day for 4 wk, respectively) and LDL-cholesterol/HDL-cholesterol ratio (from 2.7 +/- 0.98 to 2.4 +/- 0.85 and 2.8 +/- 0.95 to 2.5 +/- 0.79, p<0.005) in hypercholesterolemic volunteers. Analysis of blood glycemic response after eating banana showed significantly lower 2 h-postprandial glucose level compared to baseline in hypercholesterolemic volunteers given a dose of 250 g/day. The changes of blood glucose and lipid profile in diabetic patients were not statistically significant, but for plasma levels of adiponectin, there were significantly increased (from 37.5 +/- 9.36 to 48.8 +/- 7.38 ng.ml(-1), p<0.05) compared to baseline. Although it remains to be confirmed with larger group of volunteers, this pilot study has demonstrated that daily consumption of banana (@ 250 g/day) is harmless both in diabetic and hypercholesterolemic volunteers and marginally beneficial to the later.