Whole Grains

Research summary

• Whole grain intake is supported by a large dose-response meta-analysis of prospective studies linking higher consumption to lower cardiovascular disease, cancer, and all-cause mortality, reinforced by a major Lancet series on carbohydrate quality and fiber, and an American Heart Association dietary guidance statement.
• Multiple independent reviews on dietary fiber mechanisms converge on similar conclusions regarding cardiovascular benefit, giving a fairly consistent picture across both mechanistic and outcome-based research.
• As with most dietary pattern research, the underlying data are largely observational cohorts rather than randomized outcome trials, but the consistency across multiple large meta-analyses and major guideline bodies supports a comparatively strong evidence base.