For adults with insulin resistance, eating a diet low in energy density and high in either potatoes or beans slightly reduces the size of LDL cholesterol particles over eight weeks, which may lower heart disease risk, with no meaningful difference between the two foods.
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.
Whether low-energy-density diets high in potatoes or beans consistently reduce LDL particle size across diverse populations with insulin resistance over 6–12 months.
A systematic review and meta-analysis of at least 10 RCTs with 100+ participants each, aged 30–65 with HOMA-IR >2.5, comparing 8–12 weeks of potato- or bean-based low-energy-density diets (≥4 oz/day, energy density ≤1.1 kcal/g) against control diets, measuring LDL particle size via NMR as primary outcome.
Whether a low-energy-density diet high in potatoes causes greater reduction in LDL particle size than one high in beans in insulin-resistant adults over 12 weeks.
A double-blind, parallel-group RCT with 120 participants aged 35–60 with insulin resistance (HOMA-IR >2.5), randomized to either a potato-based diet (4 oz cooled potatoes daily, energy density 1.0 kcal/g) or a bean-based diet (4 oz cooked pulses daily, energy density 1.0 kcal/g), with controlled feeding for 12 weeks, measuring LDL particle size via NMR as primary endpoint.
Whether habitual consumption of low-energy-density potato or bean diets over 5 years is associated with reduced LDL particle size and lower cardiovascular events in adults with insulin resistance.
A prospective cohort study following 2,000 adults aged 40–65 with insulin resistance (HOMA-IR >2.5) for 5 years, categorizing dietary patterns by potato or bean intake (≥4 oz/day, low-energy-density) versus low-intake controls, and tracking LDL particle size via NMR and cardiovascular events annually.
Whether individuals consuming low-energy-density potato or bean diets have smaller average LDL particle size compared to those consuming high-energy-density diets in a population sample.
A cross-sectional survey of 5,000 adults aged 30–70 measuring daily potato/bean intake (type, preparation, quantity), LDL particle size via NMR, and energy density of diet, adjusting for physical activity, total calories, and fiber intake.
Whether individual cases of insulin-resistant patients show marked reduction in LDL particle size after adopting a low-energy-density potato or bean diet.
A case series of 10–15 insulin-resistant patients who voluntarily adopted a diet of 4 oz daily cooled potatoes or pulses with energy density ≤1.1 kcal/g for 8 weeks, documenting changes in LDL particle size via NMR.