People with a normal weight who eat more dietary cholesterol have a greater increase in heart disease risk than overweight or obese people who eat the same amount, indicating that body weight may influence how cholesterol affects the heart.
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 systematic review and meta-analysis of cohort studies stratified by BMI would determine whether the association between dietary cholesterol and CVD is consistently stronger in normal-weight individuals.
A systematic review and meta-analysis of 15+ prospective cohort studies that report BMI-stratified hazard ratios for dietary cholesterol and CVD, adjusting for age, sex, smoking, and saturated fat, with pooled estimates for normal-weight (BMI <25), overweight (25–29.9), and obese (≥30) groups.
A randomized trial could determine whether reducing dietary cholesterol lowers CVD risk more in normal-weight individuals than in those with obesity.
A double-blind, randomized trial of 1,800 adults (600 normal-weight, 600 overweight, 600 obese) aged 45–75, randomized to consume 100 mg/day or 400 mg/day of dietary cholesterol for 8 years, with primary outcome of composite CVD events, stratified by BMI category and adjusted for insulin sensitivity.
A prospective cohort study with BMI-stratified analysis could confirm whether the cholesterol-CVD association differs by weight status after accounting for metabolic health markers.
A prospective cohort of 10,000 adults aged 40–70 with annual BMI measurements, fasting glucose, insulin, and lipid profiles, and annual dietary assessments of cholesterol intake, followed for 20 years with centralized adjudication of CVD events, stratified by BMI category.
A case-control study could compare dietary cholesterol intake in normal-weight and overweight/obese individuals with and without CVD to assess whether the association differs by BMI.
A matched case-control study of 1,200 normal-weight, 1,200 overweight, and 1,200 obese adults with incident CVD and 1,200 without, matched for age and sex, with detailed dietary recall of cholesterol intake over the prior 5 years, stratified by BMI and adjusted for physical activity.
A cross-sectional study could examine whether dietary cholesterol intake correlates with arterial plaque or LDL levels more strongly in normal-weight individuals than in those with obesity.
A cross-sectional analysis of 4,000 adults (1,300 normal-weight, 1,300 overweight, 1,400 obese) aged 45–75 measuring dietary cholesterol intake via food frequency questionnaire and carotid intima-media thickness or LDL cholesterol levels, stratified by BMI category and adjusted for insulin resistance.