Epidemiological and Multi-Omics Investigation of Phytosterol Intake and Type 2 Diabetes Risk

Area of Science:

• Nutritional Epidemiology
• Metabolomics
• Microbiome Research

Background:

• Limited evidence links dietary phytosterol intake to type 2 diabetes (T2D) risk.
• Phytosterols are plant compounds found in whole grains, nuts, seeds, fruits, vegetables, and oils.

Purpose of the Study:

• To investigate the association between dietary phytosterol intake and T2D risk.
• To identify underlying plasma metabolic, metabolomic, and gut microbial features associated with this relationship.

Main Methods:

• Prospective cohort study of 204,633 participants over 36 years.
• Dietary intake assessed via food-frequency questionnaires; T2D risk analyzed using Cox proportional hazards models.
• Sub-analyses included plasma biomarkers, metabolomics, and gut microbiome data.

Main Results:

• Higher total phytosterol intake was associated with significantly lower T2D risk (HR=0.87).
• β-sitosterol and campesterol intake showed similar inverse associations with T2D risk.
• Favorable metabolic profiles and gut microbial associations were observed with higher β-sitosterol and campesterol intake.

Conclusions:

• Increased dietary intake of phytosterols, particularly β-sitosterol and campesterol, is associated with a reduced risk of developing T2D.
• Findings support the role of plant-based diets rich in phytosterols in T2D prevention.
• Multi-omics analyses confirm the epidemiological associations, underscoring the biological plausibility.