Eating macadamia nuts doesn't really lower your bad cholesterol much, but walnuts do make a noticeable difference.
Evidence from Studies
Supporting (2)
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Macadamia nut effects on cardiometabolic risk factors: a randomised trial
The study found that eating macadamia nuts every day didn’t significantly lower bad or total cholesterol, which supports the idea that they don’t help much with cholesterol compared to other nuts like walnuts.
Macadamia nut effects on cardiometabolic risk factors: a randomised trial
The study found that eating macadamia nuts every day didn’t significantly lower bad or total cholesterol, which supports the idea that they don’t help much compared to other nuts like walnuts that do lower cholesterol more noticeably.
Contradicting (1)
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Macadamia Nut Consumption Modulates Favourably Risk Factors for Coronary Artery Disease in Hypercholesterolemic Subjects
The study looked at how macadamia nuts affect heart disease risk factors, but it didn’t measure cholesterol changes in this experiment or compare them to walnuts, so we can’t tell if the claim is right based on this study.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.