The more closely people with high cholesterol follow a heart-healthy eating plan, the more their bad cholesterol tends to go down — and we see a clear but moderate link between sticking to the diet and lower LDL levels.

What we've found so far is that following a cholesterol-lowering diet more closely tends to be linked with greater reductions in LDL cholesterol for people with high cholesterol. Our analysis of the available research shows this pattern is supported by the evidence we’ve reviewed. We looked at 66.0 studies or assertions that examined how closely people follow heart-healthy eating plans and how that relates to changes in their LDL cholesterol levels. Every one of them supports the idea that better adherence to these diets is associated with larger drops in bad cholesterol [1]. We did not find any studies that refute this link. The relationship appears to be clear but moderate—meaning that while the trend is consistent, the size of the effect varies and isn’t extremely strong in all cases. This means that, based on what we've reviewed so far, sticking more closely to a heart-healthy eating pattern generally goes hand in hand with lower LDL levels in people who start with high cholesterol. However, we’re not claiming this proves diet causes the drop, nor are we saying the effect is the same for everyone. Our current analysis only shows a consistent association. We don’t yet have evidence that contradicts this pattern, but we also can’t say how strong or reliable this link might be across different diets, lifestyles, or individuals. As always, new data could refine or change what we understand. Practical takeaway: If you have high cholesterol, eating in line with heart-healthy guidelines may help lower your LDL—and the more consistently you follow the diet, the more benefit you might see. But how much it helps can vary from person to person.