Heart disease remains the leading cause of death across the world. Every year, it is responsible for nearly 18 million deaths. The condition includes problems such as heart attacks, stroke, and heart failure, and it often develops slowly over many years.
Doctors know that several factors increase the risk of heart disease. These include unhealthy diets, lack of exercise, smoking, obesity, and family history.
Because heart disease is so common, scientists are constantly searching for simple lifestyle changes that could help people reduce their risk. A new study from researchers at Edith Cowan University in Australia suggests that one small change in everyday eating habits may help protect the heart.
The study found that eating vegetables that are naturally rich in nitrates may improve heart health and lower the risk of cardiovascular disease.
Nitrates are natural compounds found in certain vegetables. When people eat these vegetables, the body converts nitrates into a molecule called nitric oxide.
Nitric oxide plays an important role in the body because it helps blood vessels relax and widen. When blood vessels are more relaxed, blood can flow more easily through the body. This helps reduce blood pressure and improves circulation.
Lower blood pressure is especially important for preventing heart disease. High blood pressure forces the heart to work harder to pump blood through the body. Over time, this extra strain can damage the heart and blood vessels.
Several common vegetables contain high levels of natural nitrates. Some of the best sources include beetroot, spinach, kale, arugula, celery, radishes, and turnips. These vegetables are widely available in grocery stores and can easily be added to many meals.
To understand how these foods affect heart health over time, the research team analyzed health data from more than 50,000 adults living in Denmark. The participants were part of a large long‑term health project that followed people for more than two decades.
The scientists tracked the participants for about 23 years. During this time, they collected information about the participants’ diets, health conditions, and lifestyle habits. This allowed the researchers to compare people who ate more nitrate‑rich vegetables with those who ate fewer of them.
The results showed a clear pattern. People who regularly ate nitrate‑rich vegetables tended to have slightly lower blood pressure and a lower risk of developing heart disease.
On average, participants who ate more of these vegetables had about a 2.5 millimeters of mercury reduction in systolic blood pressure. Systolic blood pressure is the top number in a blood pressure reading, which represents the pressure in the arteries when the heart beats.
Although a drop of 2.5 may sound small, even modest reductions in blood pressure can have a meaningful impact on heart health when maintained over many years.
More importantly, the study found that people who consumed nitrate‑rich vegetables had a 12 percent to 26 percent lower risk of developing cardiovascular diseases compared with people who rarely ate them.
One of the strongest effects was seen in peripheral artery disease. This condition occurs when arteries that supply blood to the legs become narrow or blocked. Poor blood flow to the legs can cause pain while walking and may lead to serious complications if untreated.
Participants who ate higher amounts of nitrate‑rich vegetables had about a 26 percent lower risk of developing this condition.
The study also found lower rates of heart attacks, strokes, and heart failure among people who regularly included these vegetables in their diets.
One surprising finding was that people did not need to eat large amounts to see benefits. The researchers found that about one cup of raw nitrate‑rich vegetables per day, or about half a cup of cooked vegetables, was enough to produce the protective effects.
Eating more than this amount did not appear to provide additional benefits. This suggests that a moderate and consistent intake may be sufficient to support heart health.
Dr. Catherine Bondonno, who led the research, explained that adding these vegetables to daily meals can be simple. For example, people could add a handful of spinach to a smoothie with fruit such as banana and berries. Others might include beetroot in salads or add leafy greens to sandwiches and cooked dishes.
These small dietary changes can be easy to maintain and do not require expensive supplements or major lifestyle changes.
The researchers believe that natural food sources of nitrates may be particularly beneficial because they also provide other nutrients such as vitamins, minerals, and antioxidants that support overall health.
The findings of the study were published in the European Journal of Epidemiology.
As heart disease continues to be a major health challenge around the world, the research highlights how simple everyday habits can play an important role in prevention. Adding a cup of nitrate‑rich vegetables to daily meals may be a small step, but over time it could make a meaningful difference in protecting the heart and improving long‑term health.
For more information about health, please see recent studies that Vitamin D deficiency can increase heart disease risk, and results showing Zinc and vitamin B6 linked to lower death risk in heart disease.
For more information about heart health, please see recent studies about more coffee linked to heart rhythm disease, and results showing Zinc and vitamin B6 linked to lower death risk in heart disease.
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