You probably reach for cashews when you want a quick, satisfying snack. They are creamy, filling and easy to grab from the pantry.
Most of us never stop to ask if that handful is helping the heart or quietly working against it.
A controlled-feeding trial in the American Journal of Clinical Nutrition tested exactly that in 51 adults with elevated LDL cholesterol.
After four weeks, total cholesterol and LDL cholesterol dropped more on the cashew diet than on a potato-chip control diet.
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The movement was modest, not dramatic. Total cholesterol fell about 3.9 percent on cashews and barely changed on chips. LDL cholesterol, the "bad" cholesterol that drives plaque buildup in the arteries, fell about 4.8 percent on cashews.
HDL, the so-called "good" cholesterol, did not change in a meaningful way. Triglycerides also held steady. The benefit was concentrated in the two numbers linked to artery-clogging risk.
What the cashew trials actually show
The signal is real but narrow. A later randomized trial by US Department of Agriculture researchers, published in the same journal in 2019, gave 42 healthy adults a slightly larger daily serving of cashews.
They saw no significant change in blood lipids at all.
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Cashews look most useful for people whose LDL is already drifting high. For adults with normal numbers, the day-to-day effect may be too small to notice.
The broader evidence on nuts is friendlier.
A 2016 meta-analysis in BMC Medicine pooled 20 prospective studies covering up to 819,448 adults.
Each daily one-ounce serving of nuts was linked to roughly a 29 percent lower risk of coronary heart disease.
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That figure is an association, not proof. Cashews on their own were not isolated from the broader nut mix. People who eat nuts tend to eat better overall, exercise more and smoke less. Those habits can inflate the apparent benefit.
Daily portion for most adults
One ounce is the research-supported amount. That works out to 28 grams, or about 18 cashews.
It also carries about 157 calories, almost all from fat, which is mostly the monounsaturated kind linked to better cholesterol numbers.
Harvard T.H. Chan School of Public Health advises swapping nuts in for a less healthy snack like chips rather than adding them on top of what you already eat.
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Added as pure extra calories, a daily handful could add 10 pounds or more in a year.
Salt is the other thing to watch. The American Heart Association recommends unsalted, dry-roasted nuts. A heavily salted cashew mix can push sodium into the territory that raises blood pressure in people who are salt-sensitive.
For adults already taking a cholesterol-lowering medicine or managing high LDL, a doctor is still the right person to decide the overall plan. Cashews are a snack swap, not a replacement for treatment.
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This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.