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Heart-Healthy Diet Guidelines
Key recommendations for a heart-healthy diet include:
Everyone agrees that Americans consume too much sodium (salt) in their diet, but not everyone agrees on how much sodium is too much. A 2013 report from the Institute of Medicine cautions that restricting dietary sodium intake to no more than 2,300 mg/day (less than 1 teaspoon of salt) is an important goal but that reducing sodium intake below this amount may not be beneficial and might even harm certain patients. In contrast, the American Heart Association stands behind its recommendations that people consume no more than 1,500 mg (less than ¾ teaspoon) of sodium a day. Ask your doctor what sodium intake goals would be best for you.
Heart-Healthy Research News
The goals of a heart-healthy diet are to eat foods that help obtain or maintain healthy levels of cholesterol and fatty molecules called lipids. You can achieve this by:
Any diet should also help keep blood pressure and weight under control. It is also extremely important to limit daily salt (sodium) intake.
The American Heart Association’s (AHA) current dietary and lifestyle guidelines recommend:
Women who are pregnant or breastfeeding should avoid eating fish that is high in mercury content (shark, swordfish, mackerel, and tile fish). Choose fish and shellfish that are lower in mercury content and eat about 12 ounces/week. The AHA recommends a higher weekly fish amount for women than for men. However, women of childbearing age should limit tuna to 6 ounces a week to reduce the risks for mercury contamination.
Atherosclerosis, the build-up of plaque in the arteries, begins in childhood. It is important for children and adolescents to adopt a heart-healthy diet to help prevent the development of heart disease later in life. Children should eat foods that are low in saturated fat, trans fat, and cholesterol. These foods include:
Vitamin D deficiencies in children and adolescents may be associated with high blood pressure, unhealthy cholesterol levels, and high blood sugar levels, which put patients at increased risk of heart disease, diabetes, and metabolic syndrome. The American Academy of Pediatrics recommends that children and adolescents get a daily intake of at least 400 IU of vitamin D daily from food or supplement sources. [For more information, see “Vitamins” in Nutrition Basics section of this report.]
Some fat is essential for normal body function. Fats can have good or bad effects on health, depending on their chemistry. When it comes to reducing heart disease risk, the type of fat may be more important than the total amount of fat.
Monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA) are “good” fats that help promote heart health. MUFAs and PUFAs should be the main type of fats consumed. Saturated fats and trans fats (trans fatty acids) are “bad” fats that can contribute to heart disease, and should be avoided or limited.
Current dietary guidelines for heart health recommend that:
All fats, good or bad, are high in calories compared to proteins and carbohydrates. One fat gram provides 9 calories. The American Heart Association recommends choosing fats and oils that have less than 2 grams of saturated fat per tablespoon.
Try to replace saturated fats and trans fatty acids with unsaturated fats from plant and fish oils. Omega-3 fatty acids, which are found in fish and some plant sources, are a good source of unsaturated fats. Fish oils contain the omega-3 fatty acids docasahexaenoic (DHA) and eicosapentaenoic (EPA) acids, which have significant benefits for the heart. Generally, two servings of fish per week provide a healthful amount of these omega-3 fatty acids.
Although eating fish appears to protect the heart, the effect of fish oil supplements is unclear. Some studies suggest these supplements are heart protective, but recent studies have indicated that omega-3 fatty acid supplements have minimal benefit. Still, patients with high triglycerides or heart arrhythmia may benefit from fish oil supplements, particularly if they do not consume enough fish in their diet.
Fat Substitutes. Fat substitutes added to commercial foods or used in baking, deliver some of the desirable qualities of fat, but they do not add as many calories. They cannot be eaten in unlimited amounts. They are considered most useful for helping keep down total calorie count.
A number of other fat-replacers are also available. Although studies to date have not shown any significant adverse health effects, their effect on weight control is uncertain, since many of the products containing them may be high in sugar. People who learn to cook using foods naturally lacking or low in fat eventually lose their taste for high-fat diets, something that may not be true for those using fat substitutes.
Carbohydrates are either complex (as in starches) or simple (as in sugars). One gram of carbohydrates provides four calories. The current general recommendation is that carbohydrates should provide 50 - 60% of the daily caloric intake. Many studies report that people can protect their heart and circulation by eating plenty of fruits and vegetables.
Complex Carbohydrates (Fiber). Complex carbohydrates found in whole grains and vegetables are preferred over those found in starch-heavy foods, such as pastas, white-flour products, and white potatoes. Most complex carbohydrates are high in fiber, which is important for health. Whole grains are extremely important for people with diabetes or those at risk for it.
Dietary fiber is an important component of many complex carbohydrates. It is found only in plants. Fiber cannot be digested by humans but passes through the intestines, drawing water with it, and is eliminated as part of feces content. The recommended daily intake of dietary fiber for heart protection is at least 25 grams for women and 38 grams for men ages 19 to 50. Older women and men need at least 21 and 30 grams of fiber, respectively.
Different fiber types may have specific benefits:
Simple Carbohydrates (Sugar). Doctors recommend that no more than 10% of daily calories should come from sugar. (Currently, Americans eat nearly half a pound of sugar a day on average, and sugar intake constitutes 25% of a day's calories.) Sugars are usually one of two types:
High levels of sugar consumption -- whether fructose or sucrose -- are associated with higher triglycerides and lower levels of HDL ("good") cholesterol. The high consumption of sugar is contributing to our current obesity epidemic. Soda, other sweetened beverages, and fruit juice are major causes of childhood obesity.
The American Heart Association recommends eating nutrient-rich fruits and vegetables instead of sugar-sweetened beverages and food products with added sugars. Women should consume no more than 6 teaspoons (100 calories) of added sugar daily and men no more than 9 teaspoons (150 calories).
Be aware that nutrition labels on food packages do not distinguish between added sugar and naturally occurring sugar. Ingredients that indicate added sugars include corn sweetener, corn sugar, high fructose corn syrup, fruit juice concentrates, honey, molasses, and any sugar molecules ending in “ose” (dextrose, fructose, glucose, lactose, maltose, sucrose).
Protein is found in animal-based products (meat, poultry, fish, and dairy) as well as vegetable sources such as beans, soy, nuts, and whole grains. In general, doctors recommend that proteins should provide 12 - 20% of daily calories. One gram of protein contains 4 calories. Protein is important for strong muscles and bones. The best sources of protein are fish, poultry, and soy. Restrict intake of red meat or any meat that is not lean.
Dietary Cholesterol. Animal-based protein contains dietary cholesterol. High amounts of dietary cholesterol occur in meat, whole fat dairy products, egg yolks, and shellfish. (Plant foods, such as fruits, vegetables, nuts, grains, do not contain cholesterol.) The American Heart Association recommends no more than 300 mg of dietary cholesterol per day for the general population and no more than 200 mg daily for those with high cholesterol or heart disease.
Fish. Fish is probably the best source of protein. Evidence suggests that eating moderate amounts of fish (twice a week) may improve triglyceride and HDL levels and help lower the risks for death from heart disease, dangerous heart rhythms, blood pressure, a tendency for blood clots, and the risk for stroke.
The most healthy fish are oily fish such as salmon, mackerel, trout, sardines, or albacore ("white") tuna, which are high in the omega-3 fatty acids DHA and EPA. Most guidelines recommend eating fish at least twice a week. On average, three capsules of fish oil (preferably as supplements of DHA-EPA) are about equivalent to eating one serving of fish. However, some studies suggest that fish oil supplements are not as heart protective as dietary sources.
Doctors may recommend that people with heart disease or high triglyceride levels consume more fish or take DHA-EPA supplements. Target goals for DHA-EPA consumption are at least 500 mg/day for people without clinical signs of heart disease and 800 - 1,000 mg/day for people with heart disease or heart failure.
Women of childbearing age or nursing mothers should avoid fish that contains high amounts of mercury (such as shark, swordfish, golden bass, and king mackerel) and limit intake of tuna to 6 ounces/week. They should, however, try to eat at least 12 ounces/week of a variety of lower mercury-containing fish and shellfish (such as catfish, salmon, haddock, perch, tilapia, trout, crab, shrimp, and scallops). Most doctors agree that the benefits of fish intake (especially from low-mercury fish) outweigh the potential risks.
Soy. Soy is an excellent food. It is rich in both soluble and insoluble fiber, omega-3 fatty acids, and provides all essential proteins. Soy proteins have more vitamins and minerals than meat or dairy proteins. They also contain polyunsaturated fats, which are better than the saturated fat found in meat. The best sources of soy protein are soy products (such as tofu, soy milk, and soybeans). Soy sauce is not a good source. It contains only a trace amount of soy and is very high in sodium.
For many years, soy was promoted as a food that could help lower cholesterol and improve heart disease risk factors. But an important review of studies found that soy protein and isoflavone supplement pills do not have a major effect on cholesterol or heart disease prevention. The American Heart Association still encourages patients to include soy foods as part of an overall heart healthy diet but does not recommend using isoflavone supplements.
Meat and Poultry. For heart protection, choose lean meat. Saturated fat in meat is the primary danger to the heart. The fat content of meat varies depending on the type and cut. It is best to eat skinless chicken or turkey. The leanest cuts of pork (loin and tenderloin), veal, and beef are nearly comparable to chicken in calories and fat as well as their effect on LDL and HDL levels. However, in terms of heart health, fish or beans are better choices.
Dairy Products. The best dairy choices are low-fat or fat-free products. Substituting low-fat dairy products can help lower blood pressure, reduce the risk for stroke, and lower the incidence of factors related to type 2 diabetes and heart disease (insulin resistance, high blood pressure, and unhealthy cholesterol).
Antioxidant Vitamins. Vitamins E and C have been studied for their health effects because they serve as antioxidants. Antioxidants are chemicals that act as scavengers of particles known as oxygen-free radicals (also sometimes called oxidants). High intake of foods rich in these vitamins (as well as other food chemicals) have been associated with many health benefits, including prevention of heart problems.
Although some older research initially observed favorable effects from vitamin E in preventing blood clots and preventing build-up of plaque on blood vessel walls, many recent studies have found no heart protection from either vitamin E or C supplements. Supplements of vitamin E, vitamin C, and beta-carotene are not recommended.
B Vitamins (Folic Acid). Deficiencies in the B vitamins folate (known also as folic acid), B6, and B12 have been associated with a higher risk for heart disease in some studies. Such deficiencies produce higher blood levels of homocysteine, an amino acid that has been associated with a higher risk for heart disease, stroke, and heart failure.
While major studies have indicated that B vitamin supplements help lower homocysteine levels, they do not protect against heart disease, stroke, or dementia (memory loss). Homocysteine may be a marker for heart disease rather than a cause of it.
Vitamin D. Vitamin D, in addition to promoting bone health, may also be important for heart health. In studies, people who were vitamin D deficient appeared to have an increased risk for heart-related deaths. Other studies have suggested that children and adolescents who have low blood levels of vitamin D may be at increased risk of developing heart disease and diabetes. More research is needed.
Dietary sources of vitamin D include fatty fish (such as salmon, mackerel, and tuna), egg yolks, liver, and vitamin D-fortified milk, orange juice, or cereals. Sunlight is also an important source of vitamin D. However, many Americans do not get enough vitamin D solely from diet or exposure to sunlight and may require supplements.
At this time, there is no standard recommendation for whether people should take vitamin D supplements for heart health, or at what dosages. Many doctors recommend that for bone and overall health, children and teenagers should get at least 400 IU of vitamin D daily, adults under age 50 should get 400 - 800 IU daily, and adults over age 50 should get 800 - 1,000 IU daily.
Potassium. A potassium-rich diet can provide a small reduction in blood pressure. Potassium-rich foods include bananas, oranges, pears, prunes, cantaloupes, tomatoes, dried peas and beans, nuts, potatoes, and avocados. Potassium supplements should not be taken by patients without checking with your doctor first. For those using potassium-sparing diuretics (such as spironolactone), or have chronic kidney problems, potassium supplements may be very dangerous.
Magnesium. Some studies suggest that magnesium supplements may cause small but significant reductions in blood pressure. The recommended daily allowance of magnesium is 320 mg. People who live in soft water areas, who use diuretics, or who have other risk factors for magnesium loss may require more dietary magnesium than others.
Calcium. Calcium regulates the tone of the smooth muscles lining blood vessels. Studies have found that people who consume enough adequate dietary calcium on a daily basis have lower blood pressure than those who do not. Consuming too much dietary calcium may have a negative effect: The effects of extra calcium on blood pressure, however, are mixed, with Ssome studies indicate that excess calcium intake (from dietary or supplement sources) may increase blood pressure and other heart disease risk factors.showing higher pressure with calcium supplementation. Studies have indicated that calcium supplements do not prevent heart disease and some controversial reports suggest that they might even increase risk.
Some sodium (salt) is necessary for health, but the amount is vastly lower than that found in the average American diet. High salt intake is associated with high blood pressure (hypertension). Everyone should restrict their sodium intake. Limiting sodium can help lower blood pressure and may also help protect against heart failure and heart disease.
Target goals for sodium intake are currently under review. The American Heart Association and the World Health Organization are among the groups recommending that people, especially those with heart disease risk factors, limit sodium intake to no more than 1,500 mg a day. In contrast, a recent report from the Institute of Medicine (IOM) found no additional clinical benefit in reducing daily sodium intake below 2,300 mg. The IOM report also suggested that severe sodium restriction might harm certain patients.
At this time, 2,300 mg seems a reasonable universal target. People should discuss more stringent goals with their doctors. Many people find it difficult to reduce sodium intake all the way down to 1,500 mg a day.
Some people (especially African-Americans, older adults, people with diabetes, and people with a family history of hypertension) are “salt sensitive,” which means their blood pressure responds much more to salt than other people. People with salt sensitivity have a higher than average risk of developing high blood pressure as well as other heart problems. Sodium restriction is particularly important for people with salt sensitivity.
Simply eliminating the use of salt at the table eating can help. But it is also important to reduce or avoid processed and prepared foods that are high in sodium. Spices can be used in place of salt to enhance flavor.
Salt substitutes, such as Nusalt and Mrs. Dash (which contain mixtures of potassium, sodium, and magnesium), are available, but they can be risky for people with kidney disease or those who take blood pressure medication that causes potassium retention. For people without risks for potassium excess, adding potassium-rich foods to a diet can help.
Here are some tips to lower your sodium (salt) intake:
Water. People with certain medical conditions, (such as heart failure), that cause fluid retention may need to restrict their intake of water and other fluids.
Alcohol. A number of studies have found heart protection from moderate alcohol intake (one or two glasses a day). The benefits reported include higher HDL levels, blood clot prevention, and anti-inflammatory properties plus lower rates of heart failure and heart attack. Although red wine is most often cited for healthful properties, any type of alcoholic beverage appears to have similar benefit.
However, alcohol abuse can increase the risk of high blood pressure and many other serious problems. Men should limit their intake to an average of no more than one or two drinks a day, and women (especially those at risk for breast cancer) and thinner people should only have one drink a day. (A “drink” is equivalent to a 12-ounce bottle of beer, a 5-ounce glass of wine, or a 1.5-ounce shot of hard liquor.)
Overuse of alcohol can also lead to many heart problems. People with high triglyceride levels should drink sparingly if at all because even small amounts of alcohol can significantly increase blood triglycerides. Pregnant women, people who can't drink moderately, and people with liver disease should not drink at all. People who are watching their weight should be aware that alcoholic beverages are very high in calories.
Coffee and Tea. Coffee drinking is associated with small increases in blood pressure, but the risk it poses is very small in people with normal blood pressure. Moderate coffee consumption (1 - 2 cups a day) poses no heart risks and long-term coffee consumption does not appear to increase the risk for heart disease in most people, even if they consume large daily amounts.
Although both black and green tea contain caffeine, they are safe for the heart. Tea contains chemicals called flavonoids that may be heart protective.
The Mediterranean diet is rich in heart-healthy fiber and nutrients, including omega-3 fatty acids and antioxidants. The diet consists of fruits, vegetables, and unsaturated “good” fats, particularly olive oil.
Olive oil may help lower blood pressure, lower risk for heart disease, and possibly have specific benefits for people with type 2 diabetes. Olive oil contains monounsaturated fatty acids (MUFAs) and also contains polyphenols, which are phytochemicals that contain antioxidant properties.
Virgin olive oil comes from a simple pressing of the fruit. Extra-virgin olive oil is a superior tasting form of virgin olive oil. Non-virgin olive oils are produced using chemical processes. For health purposes, it is best to use extra-virgin or virgin olive oil. .
There are several variations to the Mediterranean diet, but general recommendations include:
Even though fats make up about 40% of the calories found in the traditional Mediterranean diet, they are mostly unsaturated. Growing evidence continues to support the heart-protective properties of the Mediterranean diet. Research has shown that such a diet prevents heart disease, reduces the risk for a second heart attack and helps cholesterol-lowering statin drugs work better. (Despite claims, garlic does not help lower LDL "bad "cholesterol, though it adds flavor to many Mediterranean recipes.)
Seniors who combine a Mediterranean diet with healthy lifestyle habits have been found to live longer lives. Many studies confirm that the Mediterranean diet is as good or better than a low-fat diet for preventing heart attack, stroke, or other heart events.
Premenopausal women on the diet should eat foods rich in iron or vitamin C, which aids in iron absorption. Women should also ask their doctor if they need a calcium supplement because they consume fewer dairy products. People should avoid wine if they have risk factors for complications from alcohol. Such people include women who are pregnant or at risk for breast cancer and anyone prone to alcohol abuse.
The salt-restrictive DASH diet (Dietary Approaches to Stop Hypertension) is proven to help lower blood pressure, and may have additional benefits for preventing heart disease, stroke, and heart failure. Effects on blood pressure are sometimes seen within a few weeks. This diet is rich in important nutrients and fiber. It also provides far more potassium (4,700 mg/day), calcium (1,250 mg/day), and magnesium (500 mg/day) -- but much less sodium -- than the average American diet.
DASH diet recommendations:
Low carbohydrate diets generally restrict the amount of carbohydrates but do not restrict protein sources.
The Atkins diet restricts complex carbohydrates in vegetables and, particularly, fruits that are known to protect against heart disease. The Atkins diet also can cause excessive calcium excretion in urine, which increases the risk for kidney stones and osteoporosis.
Low-carb diets, such as South Beach, The Zone, and Sugar Busters, rely on a concept called the "glycemic index," or GI, which ranks foods by how fast and how high they cause blood sugar levels to rise. Foods on the lowest end of the index take longer to digest. Slow digestion wards off hunger pains. It also helps stabilize insulin levels. Foods high on the glycemic index include bread, white potatoes, and pasta, while low-glycemic foods include whole grains, fruit, lentils, and soybeans.
There has been debate about whether Atkins and other low-carbohydrate diets can increase the risk for heart disease, as people who follow these diets tend to eat more animal-saturated fat and protein and less fruits and vegetables. In general, these diets appear to lower triglyceride levels and raise HDL (“good”) cholesterol levels. Total cholesterol and LDL (“bad”) cholesterol levels tend to remain stable or possibly increase somewhat. However, large studies have not found an increased risk for heart disease, at least in the short term. In fact, some studies indicate that these diets may help lower blood pressure.
Low-carbohydrate diets help with weight loss in the short term, possibly better than diets that allow normal amounts of carbohydrates and restrict fats. However, overall, there is not good evidence showing long-term efficacy for these diets. Likewise, long-term safety and other possible health effects are still a concern, especially since these diets restrict healthy foods such as fruit, vegetables, and grains while not restricting saturated fats.
Dietary guidelines recommend keeping total fat intake to 20 - 30% of total daily calories, with saturated fat less than 10% of calories. Very low-fat diets generally restrict fat intake to 20% or less of total daily calories. The Ornish program, recommended for some heart disease patients, limits fats even more drastically. It aims to reduce saturated fats as much as possible, restricting total fat to 10%, and increasing carbohydrates to 75% of calories.
The Ornish program is a very demanding regimen:
Benefits of Low-Fat Diets. Low-fat programs may help keep weight off. Low-fat diets that are high in fiber, whole grains, legumes, and fresh produce offer health advantages in addition to their effects on cholesterol. These foods are also lower on the glycemic index than high-glycemic foods, such as bread, potatoes, and pasta. Lowering the glycemic index (by, for example, cutting down on starchy vegetables and replacing pasta with whole grains) may help increase weight loss and heart benefits for high-carbohydrate diets.
While claims regarding a significant reduction in angina and even reduction in coronary artery stenosis have been made by the Ornish program directors, actual regression in atherosclerosis or prevention of heart disease has only been shown in a small number of patients.
Concerns Regarding Low-Fat Diets. The American Heart Association notes that the Ornish program is so difficult to maintain that most people have difficulty staying with it. Very low-fat diets reduce HDL ("good") cholesterol levels. These diets may also reduce calcium absorption, which can be harmful for women at risk for osteoporosis. Many people who reduce their fat intake do not consume enough of the basic nutrients, including vitamins A, D, E, calcium, iron, and zinc. People on low-fat diets should eat a wide variety of foods and take a multivitamin if appropriate.
Calorie restriction has been the cornerstone of weight-loss programs. Restricting calories also appears to have beneficial effects on cholesterol levels, including reducing LDL and triglycerides and increasing HDL levels. A 5 – 10% decrease in body weight can result in a 20% decrease in triglyceride levels. In general, reducing calories and increasing exercise is still the best method for maintaining weight loss and preventing serious conditions, notably diabetes.
The standard dietary recommendations for losing weight are:
Lifelong changes in eating habits, physical activity, and attitudes about food and weight are essential to weight management. Unfortunately, although many people can lose weight initially, it is very difficult to maintain weight loss. Here are some general suggestions that may be helpful:
Inactivity is a major risk factor for coronary artery disease, on par with smoking, unhealthy cholesterol, and high blood pressure. In fact, studies suggest that people who change their diet in order to control cholesterol lower their risk for heart disease only when they also follow a regular aerobic exercise program.
Research strongly supports the benefits of exercise on coronary artery disease:
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