People who eat more plant-based foods have a lower risk of dying from heart disease and cancer compared to those who eat fewer plant foods, though other factors may influence this link.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
A meta-analysis could determine whether the association between plant-based diets and reduced CVD/cancer mortality is consistent across diverse populations and whether it holds after adjusting for key confounders.
A systematic review and meta-analysis of at least 10 prospective cohort studies using standardized plant-based diet indices, reporting HRs for CVD and cancer mortality with 95% CIs, adjusting for smoking, BMI, physical activity, and socioeconomic status, with subgroup analyses by sex and age.
An RCT could determine whether shifting to a plant-based diet reduces incidence of fatal cardiovascular events or cancer diagnoses over time.
A 20-year RCT of 4,000 adults aged 50–65 with no prior CVD or cancer, randomized to a whole-food plant-based diet (≥80% plant calories) or standard diet, with annual cancer screening and cardiovascular event adjudication by blinded committees, and mortality as primary endpoint.
A new cohort study could confirm whether plant-based diet adherence predicts lower incidence of fatal CVD and cancer events over decades.
A prospective cohort of 25,000 adults aged 45–70, with dietary intake assessed every 2 years via FFQ, linked to national cancer and cardiovascular death registries, adjusting for confounders, and stratifying by baseline health status.
A case-control study could compare past plant-based diet adherence in individuals who died from CVD or cancer versus those who survived.
A matched case-control study of 1,200 individuals who died from CVD or cancer before age 75 and 1,200 survivors, assessing dietary patterns over the prior 15 years using validated FFQs and biomarkers, with focus on PDI/hPDI components.
A cross-sectional study could show whether individuals with higher plant-based diet scores have lower prevalence of preclinical CVD or cancer biomarkers.
A cross-sectional analysis of 10,000 adults measuring PDI scores alongside carotid intima-media thickness, coronary calcium scores, and cancer biomarkers (e.g., CEA, CA-125), adjusting for age, sex, and BMI.