Heart Health

Preventing Heart Disease

Make your heart and taste buds happy by adding macadamia nuts to your diet. There are are many scientific studies that support macadamias’ benefits in helping to prevent heart disease. Royal Hawaiian believes that there is supportive, but not conclusive, scientific research that shows eating 1.5 ounces per day of macadamia nuts, as part of a diet low in saturated fat and cholesterol and not resulting in increased intake of saturated fat or calories may reduce the risk of heart disease.

Number One Killer

Heart disease is the leading cause of death in the United States. In fact, the majority of deaths in the U.S. each year are caused by heart disease or stroke. Scientists continue to seek preventative measures such as finding ways to lower low-density lipoprotein (LDL) cholesterol, a known culprit behind cardiovascular disease that may lead to a heart attack or stroke.


In the 1990s and 2000s, scientists first discovered that adding macadamias to the diet appeared to lower the amount of LDL cholesterol in the blood. Since then, researchers have been exploring the connection, resulting in a growing body of scientific evidence supporting the idea that a diet that including macadamia nuts can help lower LDL cholesterol levels

Why Lowering LDL Cholesterol Is Important

Cholesterol, a fatty substance your body needs, is made up of low-density and high-density lipoproteins, or LDL and HDL, which need to be kept in balance. When LDL is too high, it can stick to blood vessel walls. HDL cholesterol acts as the cleanup crew, collecting the excess LDL and taking it to the liver to be eliminated.

Too much LDL overwhelms the HDL, so that LDL builds up on cell walls creating a substance called plaque, which can gradually clog blood vessels and cut off blood supply to the heart. Plaque can also break open and create blood clots that travel to the heart, causing heart attacks, and to the brain, causing strokes. By lowering the amount of LDL cholesterol in your blood, you can improve the ratio of HDL to LDL cholesterol, giving the HDL a chance to clean up the excess LDL and prevent plaque from building up.

Other Benefits

Macadamia nuts are an excellent source of thiamin and manganese. They are a good source of dietary fiber and copper and contain monounsaturated fat, protein, magnesium, iron and phytosterols. While the complex mix of nutrients in every macadamia nut may help lower bad cholesterol, scientists are now exploring whether macadamia nut’s unique nutrient blend might offer other benefits as well. Research conducted in recent years indicates that macadamia nuts may lessen other risk factors related to heart disease.

Macadamia nuts may fight insulin resistance by helping the body become more responsive to insulin. Improving insulin sensitivity can help people with pre-diabetes process food better and lessen the chance of moving into full-blown diabetes.


Researchers are looking into macadamia nuts ability to reduce inflammation, which testing confirms is commonly present in heart attack and stroke patients. Scientists believe this may be a case of the solution becoming part of the problem and that inflammation may come about because the body’s defense system perceives plaque buildup as foreign and abnormal. When the white blood cells fail in their mission to fight, the cells die and become another ingredient in plaque’s composition.

Oxidative Stress

Researchers are also studying whether macadamia nuts act as an antioxidant to limit oxidative stress, a condition connected to a number of diseases, including heart disease. Oxidative stress occurs when chemical reactions in the body create peroxide and harmful free radicals that damage cells.

What It All Means To You

The connection between macadamia nuts and heart disease continues to be an important and interesting topic of research. More and more studies support the correlation between the consumption of macadamia nuts and heart health. Though on-going research is necessary to determine exactly how macadamia nuts support overall health, you can still enjoy your favorite macadamia nuts knowing you’re making your heart (and you’re taste buds) happy!


The Goodness Inside
Heart Health
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The Royal Hawaiian story spans decades of macadamia growing, beginning in 1948 with the founding of the Royal Hawaiian Macadamia Nut Company. Though our look has evolved over the years (this can dates back to the late 1960s!), our dedication to health, wellness, and “living Aloha” live on to this day.

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