One study provided evidence that when 29 women with PCOS followed a low‐glycemic diet for 12 months, they showed a significant increase in sensitivity to insulin, improved menstrual regularity, and improved quality of life scores in comparison to the 21 women with PCOS that consumed a healthy diet of normal glycemic load (Marsh, Steinbeck, Atkinson, Petocz, & Brand‐Miller, 2010). The gene discussed is INS; the disease is polycystic ovary syndrome.