Type 2 diabetes (T2D) incidence is increasing worldwide, driven by a rapidly changing environment and lifestyle and increasing rates of
overweight and
obesity. Prevention of diabetes is key and is most likely achieved through prevention of
weight gain and/or successful long-term
weight loss maintenance.
Weight loss is readily achievable but there is considerable challenge in maintaining that
weight loss over the long term. Lower-fat
carbohydrate-based diets are widely used for T2D prevention. This is supported primarily by 3 successful long-term interventions, the US Diabetes Prevention Program, the Finnish Diabetes Prevention Study, and the Chinese Da Qing Study, but evidence is building in support of novel higher-
protein (>20% of energy) diets for successful
weight loss maintenance and prevention of T2D. Higher-
protein diets have the advantage of having relatively low energy density, aiding longer-term appetite suppression, and preserving lean body mass, all central to successful
weight loss and prevention of weight regain. Here, we review the
carbohydrate-based intervention trials and present mechanistic evidence in support of increased
dietary protein for
weight loss maintenance and a possible novel role in prevention of dysglycemia and T2D.