Can reducing peaks prevent type 2 diabetes: implication from recent diabetes prevention trials

Area of Science:

• Endocrinology and Metabolism
• Public Health
• Cardiovascular Disease Prevention

Background:

• Postprandial hyperglycemia is increasingly recognized for its role in type 2 diabetes (T2D) and coronary heart disease (CHD) development.
• The rising incidence of T2D globally underscores the public health importance of understanding its pathophysiology and prevention.
• Impaired glucose tolerance (IGT) patients with postprandial hyperglycemia face risks for T2D, complications, and mortality.

Purpose of the Study:

• To review the pathophysiological and prognostic significance of postprandial hyperglycemia.
• To evaluate the efficacy of interventions aimed at lowering postprandial glycemic load for T2D prevention.
• To assess the impact of lifestyle modifications versus metformin on T2D risk reduction.

Main Methods:

• Analysis of clinical trial data, including the Diabetes Prevention Program (DPP) randomized trial.
• Comparison of lifestyle modification programs (weight loss, diet, exercise, smoking cessation) with metformin treatment.
• Examination of the relationship between postprandial hyperglycemia and CHD development in IGT patients.

Main Results:

• Lifestyle modifications in the DPP trial reduced T2D risk by 58% compared to placebo, outperforming metformin (31% risk reduction).
• Intervention benefits were consistent across diverse patient demographics (ethnicity, BMI, sex, glycemic level).
• Reducing postprandial hyperglycemia through lifestyle changes is linked to lower CHD incidence and mortality in IGT individuals.

Conclusions:

• Lifestyle interventions are highly effective in preventing type 2 diabetes and are superior to metformin.
• Managing postprandial hyperglycemia through lifestyle changes offers dual benefits for preventing T2D and cardiovascular disease.
• Public health strategies should prioritize lifestyle modifications for T2D and CHD prevention.