Penn State Jul 14 2025 Prediabetes affects a third of people in the United States and most of them will develop Type 2 diabetes, yet effective dietary intervention strategies remain limited. Pistachios have shown promise in improving markers of diet quality, yet little is known about how they influence the gut microbiome - a key player in glucose regulation and inflammation. A new study led by Kristina Petersen, associate professor of nutritional sciences at Penn State, determined that