 The study found that diets high in saturated fats, monounsaturated fats, and polyunsaturated fats all had different effects on glucose insulin homeostasis. Diets high in saturated fats tended to increase fasting glucose levels while decreasing fasting insulin levels. Monounsaturated fats were associated with lower HbA1c levels and reduced insulin resistance. Polyunsaturated fats were associated with lower HbA1c levels and increased insulin secretion capacity. The study also found that diets high in polyunsaturated fats were associated with better glycemic control and improved insulin secretion capacity compared to other macronutrients. This article was authored by Famiaki Mamura, Renata Mika, Jason H. Y. Wu, and others.