Diet: what actually lowers ApoB

Swap saturated fat for unsaturated: replacing fatty/processed meat, butter, and coconut oil with olive oil, nuts, seeds, and fatty fish lowers LDL/ApoB (a ~10–15% swing is achievable). Viscous fibre: oat β-glucan ≥3 g, psyllium 7–10 g, legumes → ~5–10% LDL. Plant sterols ~2 g → ~7–12%. Cut refined carbs and sugar to lower triglycerides and remnant cholesterol and shift LDL toward the larger, less-atherogenic pattern. These stack: the combined 'Portfolio Diet' reaches ~20–30% LDL reduction. Evidence ●●●●○

Mediterranean eating has the best outcome evidence — PREDIMED found ~30% fewer cardiovascular events with extra-virgin olive oil or nuts. DASH and, broadly, whole-food, high-fibre, plant-forward diets do the same job. Fatty fish helps triglycerides. No single 'superfood' matters as much as the overall pattern you eat most days.

Dietary cholesterol (eggs) matters far less than saturated fat for most people. Low-carb/keto can send LDL and ApoB sharply up in some people ('lean-mass hyper-responders') — so if you eat that way, don't assume it's heart-safe: measure your ApoB. Saturated fat's role is real but more modest than 1980s dogma, and the key is the replacement: swapping it for unsaturated fat helps, swapping it for refined carbs doesn't. And processed meat carries a consistent risk signal. The theme throughout: verify with a blood test rather than trusting the theory.