The prevention of type 2 diabetes

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Abstract
Prediabetic states that involve impairments of insulin secretion and action can be identified. Medical therapy and lifestyle modifications can be used in people with these disorders to delay or prevent the onset of type 2 diabetes. In this Review, the data on development and evaluation of diabetes-prevention strategies are discussed and some recommendations for practice are provided. Type 2 diabetes mellitus (T2DM) affects more than 7% of adults in the US and leads to substantial personal and economic burden. In prediabetic states insulin secretion and action—potential targets of preventive interventions—are impaired. In trials lifestyle modification (i.e. weight loss and exercise) has proven effective in preventing incident T2DM in high-risk groups, although weight loss has the greatest effect. Various medications (e.g. metformin, thiazolidinediones and acarbose) can also prevent or delay T2DM. Whether diabetes-prevention strategies also ultimately prevent the development of diabetic vascular complications is unknown, but cardiovascular risk factors are favorably affected. Preventive strategies that can be implemented in routine clinical settings have been developed and evaluated. Widespread application has, however, been limited by local financial considerations, even though cost-effectiveness might be achieved at the population level.