Research

Hormonal

Consumption of whole grains reduces the risk of type 2 diabetes and cardiovascular disease by improving insulin sensitivity and lowering postprandial glucose and insulin responses.

To lower your risk of diabetes and heart disease, prioritize whole grains over refined grains. The physical structure of whole grains slows digestion, leading to lower insulin spikes. Choose intact grains like barley, oats, and rye, or minimally processed whole grain products, as they have lower glycemic indices than refined flours.

GoodSupportsHIGH confidence
Epidemiological studies consistently show that risk for type 2 diabetes mellitus is decreased with consumption of whole grains... Whole-grain consumption is part of a healthy diet described as the ‘prudent’ diet.
Joanne Slavin · Proceedings of The Nutrition Society · 2003

Why this rating

Supported by multiple epidemiological studies and several feeding trials, though the paper notes a lack of large-scale long-term whole-grain specific feeding studies.

Source

Why whole grains are protective: biological mechanisms

Joanne Slavin · Proceedings of The Nutrition Society · 2003

DOI 10.1079/pns2002221

narrative_reviewCited 618×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →