Milly Gaines
Cardiovascular disease (CVD) is the leading cause of death in Western countries, accounting for almost 30% of all deaths worldwide. Unhealthy dietary patterns, such as excessive intake of sodium, processed foods, added sugars, and unhealthy fats, can lead to the development of CVD. Consuming high-fat, high-salt, high-sugar, or processed foods can contribute to plaque build-up in the arteries, increasing the risk of heart disease, heart attack, and stroke. On the other hand, a diet rich in fruits, vegetables, whole grains, lean protein, and healthy fats can substantially reduce the risk of CVD.
| Characteristics | Values |
|---|---|
| Unhealthy dietary patterns | High-fat, high-salt, high-sugar, or processed foods |
| Excessive intake of sodium and processed foods | |
| Added sugars | |
| Unhealthy fats | |
| Low intake of fruits and vegetables | |
| Excessive intake of red meat | |
| Low intake of whole grains | |
| Low intake of healthy fats | |
| Low intake of water and unsweetened beverages | |
| Healthy dietary patterns | High intake of fruits and vegetables |
| High intake of whole grains | |
| High intake of lean protein sources, such as fish, seafood, legumes, nuts, and seeds | |
| High intake of healthy fats, such as nuts, seeds, avocados, and olives | |
| High intake of water and unsweetened beverages | |
| Mediterranean diet | |
| DASH diet |
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What You'll Learn
High consumption of saturated and trans fats
Saturated fats and trans fats are unhealthy fats that can have detrimental effects on cardiovascular health. Saturated fats are found in animal products such as butter, cheese, whole milk, ice cream, sour cream, lard, and fatty meats like bacon. Some vegetable oils, including coconut, palm, and palm kernel oils, also contain saturated fats. These fats are solid at room temperature.
Trans fats, on the other hand, are formed when vegetable oils undergo hydrogenation. This process turns them into harder fats used in margarines, deep frying, and baked goods. Trans fats are often found in packaged snacks, solid margarine, fried foods, commercial baked goods (donuts, cookies, crackers), and hard margarines.
Consuming high amounts of these unhealthy fats can lead to cholesterol build-up in the arteries (blood vessels). This condition is known as atherosclerosis, which is an inflammatory disease that contributes to cardiovascular disease (CVD). Specifically, high cholesterol can raise LDL (bad) cholesterol levels while lowering HDL (good) cholesterol levels in the blood. This imbalance increases the risk of heart attack, stroke, and other major health problems associated with CVD.
To maintain cardiovascular health, it is essential to limit the consumption of saturated and trans fats. The American Heart Association recommends reducing trans fat intake by limiting fried foods and commercially baked goods. Instead, opt for polyunsaturated and monounsaturated fats from vegetable sources, such as nuts, seeds, avocados, and olive oil, which are considered healthy fats. Additionally, incorporating more fruits and vegetables into the diet can provide essential nutrients while being naturally low in unhealthy fats.
Overall, a diet low in saturated and trans fats and high in fibre and plant-based foods can significantly reduce the risk of developing cardiovascular disease. This approach aligns with dietary patterns like the Mediterranean diet, which has been associated with cardiovascular health benefits.
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Low intake of fruits and vegetables
A low intake of fruits and vegetables can increase the risk of cardiovascular disease. Fruits and vegetables are essential components of a heart-healthy diet, and their absence can have detrimental effects on cardiovascular health.
Firstly, fruits and vegetables are rich sources of fibre, vitamins, minerals, and antioxidants. A diet lacking in these nutrients can lead to higher cholesterol levels and increased risk of heart disease. Vitamins C and E, for example, act as antioxidants, protecting against LDL cholesterol and oxidative stress, which can contribute to the development of heart disease. Leafy greens, such as kale, spinach, and bok choy, are particularly beneficial in lowering blood pressure and reducing the risk of heart disease due to their high vitamin, mineral, and antioxidant content.
Secondly, a low intake of fruits and vegetables can result in higher sodium and saturated fat consumption. Fruits and vegetables are typically low in sodium and cholesterol, so when they are scarce in the diet, other foods higher in these components are often consumed in greater quantities. Excess sodium intake can increase blood pressure and put a strain on the heart, contributing to cardiovascular issues. Similarly, a diet high in saturated fats can cause cholesterol to build up in the arteries, increasing the risk of heart attack and stroke.
Additionally, a diet lacking in fruits and vegetables is often replaced with unhealthy, highly processed foods that are high in sugar, salt, and unhealthy fats. This can directly contribute to plaque build-up in the arteries, leading to constricted blood flow and a higher risk of heart disease, heart attack, and stroke.
Finally, the absence of fruits and vegetables in the diet can be detrimental over time. Atherosclerosis, the process of fatty plaque build-up in the arteries, can begin at a young age and progress over time. A consistent and adequate intake of fruits and vegetables throughout life is essential to maintaining cardiovascular health and preventing the advancement of atherosclerosis.
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Excessive salt intake
The American Heart Association recommends a maximum sodium intake of 2,300 milligrams per day (about one teaspoon of salt), with an ideal limit of no more than 1,500 milligrams for those with hypertension. The Food and Drug Administration (FDA) and AHA support the food industry's voluntary sodium intake target of 3,000 milligrams. Some companies are already reducing sodium in their products, and others will follow suit to meet the new targets.
The science behind sodium reduction is clear and supported by significant evidence. A long-term study showed a linear increase in all-cause mortality of 12% for every 1-gram increase in daily sodium consumption. A meta-analysis that included data from three studies showed that sodium intake reduction significantly reduced cardiovascular events. Additionally, consuming salty foods over a long period can accustom your taste buds to the taste, making you more likely to reach for saltier foods.
While there is ongoing research into the effects of salt intake, and some studies have shown inconclusive results, it is generally recommended to avoid excessive sodium consumption. This is especially important for those with heart failure, as it can cause complications and worsen existing conditions.
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High-sugar diet
Consuming too much added sugar can have a serious impact on heart health and can lead to cardiovascular disease. Added sugars make up at least 10% of the calories the average American consumes in a day, with men taking in an average of 24 teaspoons of added sugar per day. However, about one in ten people consume a whopping one-quarter or more of their calories from added sugar.
A 15-year study on added sugar and heart disease found that participants who got 17% to 21% of their calories from added sugar had a 38% higher risk of dying from cardiovascular disease compared to those who consumed 8% of their calories as added sugar. Overall, the odds of dying from heart disease rose with the percentage of sugar in the diet, regardless of age, sex, physical activity level, or body-mass index.
Consuming too much added sugar can raise blood pressure and increase chronic inflammation, both of which are risk factors for heart disease. Excess sugar consumption, especially in the form of sugary beverages, also contributes to weight gain by tricking the body into turning off its appetite control system. Liquid calories from sugary drinks are not as satisfying as calories from solid foods, making it easier for people to add more calories to their regular diet.
Sugar-sweetened beverages, such as sodas, energy drinks, and sports drinks, are the biggest sources of added sugar in the average American's diet. However, added sugar is also found in soft drinks, fruit drinks, flavoured yogurts, cereals, cookies, cakes, candy, and most processed foods. It is important to be mindful of portion sizes and to fill up on healthy, unprocessed foods such as fruits and vegetables, and whole grains, which have been shown to reduce the risk of chronic diseases, including heart disease.
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Lack of exercise
The recommended level of physical activity is not being achieved by most people. Approximately 60% of Americans aged 18 and older consider themselves physically inactive. Only about 22% of Americans engage in regular sustained physical activity, defined as activity lasting 30 minutes or more five times a week.
The American Heart Association recommends 30-60 minutes of aerobic exercise three to four times a week to promote cardiovascular health. Moderate activities include walking, climbing stairs, gardening, yard work, dancing, and housework. These activities don't have to feel like a chore; they can be incorporated into daily routines, such as taking the stairs instead of the elevator.
Physical inactivity has severe health consequences, including blood clots, high blood pressure, heart attack, stroke, and other heart-related issues. It leads to obesity, increases inflammation, and negatively impacts cholesterol levels. Regular exercise can reduce these risks and improve overall health and well-being. It lowers blood pressure, reduces body weight, improves glucose tolerance, and boosts HDL ("good") cholesterol.
The benefits of exercise in preventing and managing cardiovascular disease are well-established. It is a critical component of a healthy lifestyle, along with a balanced diet and other lifestyle modifications. By incorporating regular physical activity, individuals can significantly reduce their risk of cardiovascular disease and improve their overall health and longevity.
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Frequently asked questions
An unhealthy diet can cause cardiovascular disease in a number of ways, including:
- Excessive intake of sodium and salt can increase blood pressure, which can lead to heart disease and other cardiovascular issues.
- High-fat, high-sugar, and processed foods can contribute to plaque build-up in the arteries, which can lead to heart disease, heart attack, and stroke.
- A diet low in fruits and vegetables can be detrimental as they are good sources of fibre, vitamins, and minerals.
- Obesity and weight gain caused by an unhealthy diet can increase the risk of cardiovascular disease.
Some foods that can cause or increase the risk of cardiovascular disease include:
- Fried foods
- Commercial baked goods (donuts, cookies, and crackers)
- Hard margarines
- Soft drinks and candy
- Red meat
- High-fat dairy products
- Refined grain foods (white bread, pasta, baked goods)
A good diet to prevent cardiovascular disease is one that is low in saturated and trans fats and high in fibre and plant foods. The DASH diet, which includes fruits, vegetables, whole grains, and low-fat dairy products, is associated with lower cholesterol and reduced stroke and CVD mortality. The Mediterranean diet is also recommended for its anti-inflammatory properties.
In addition to diet, other lifestyle choices can help prevent cardiovascular disease, including:
- Drinking water and unsweetened beverages to prevent weight gain and reduce the risk of diabetes and obesity
- Exercising regularly
- Maintaining a healthy body weight
- Reducing stress and smoking habits
