Paquette M, Medina Larqué AS, Weisnagel SJ, et al. Br J Nutr. 2017 Feb;117(4):519-531.

A 6-week dietary intervention with 333 mg of polyphenols from strawberries and cranberries improved insulin sensitivity in overweight and obese, non-diabetic, insulin-resistant subjects but was not effective in improving other cardiometabolic risk factors.