Brenda Khan
Diet is a key factor in reducing high blood pressure, which is the most common preventable risk factor for heart disease. The DASH (Dietary Approaches to Stop Hypertension) diet has been scientifically demonstrated to reduce blood pressure and is considered one of the healthiest diets available. The DASH diet is a flexible and balanced eating plan that recommends limiting foods high in saturated fat and increasing the consumption of plant-based foods, fruits, and vegetables. In addition to the DASH diet, other dietary changes such as consuming more fibre, lean protein, dairy, nuts, and foods rich in potassium, magnesium, lycopene, and omega-3 fats have been linked to lower blood pressure.
Diet characteristics to reduce blood pressure
| Characteristics | Values |
|---|---|
| Name | Dietary Approaches to Stop Hypertension (DASH) |
| Foods to eat | Plant-based foods, fruits and vegetables, wholegrains, nuts, seeds, lean sources of protein, low-fat dairy, fatty fish, orange juice, grapefruit juice, beetroot juice, broccoli, tomatoes, kiwis, chocolate |
| Foods to limit | Fatty meats, full-fat dairy products, tropical oils, salt |
| Nutritional goals | 1,500 milligrams (mg) sodium, 3,400 mg of potassium for adult males, 2,600 mg for adult females |
| Results | Reduced blood pressure in as little as two weeks, lowers blood pressure further than 2,300 mg sodium daily |
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What You'll Learn
The DASH diet
Some tips for getting started with the DASH diet include:
- Enjoy a serving of fresh or frozen fruit as a dessert after a meal instead of a sugar-sweetened treat—frozen grapes are a delicious option.
- Incorporate unexpected vegetables into your traditional dishes, like adding sweet potatoes to chicken chili.
- Swap out fattier cuts of meat for chicken breast or other lean choices, such as turkey, fish, and beans.
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Fibre and wholegrains
Fibre and whole grains are an essential part of a healthy diet and can help to manage blood pressure. Wholegrains such as brown rice, wholemeal bread, and oats contain more nutrients and fibre than refined, starchy carbohydrates like white bread, pasta, and rice. Fibre has been linked to the prevention of several cardiovascular diseases and disorders.
The β-glucan fibre found in oats has been shown to reduce systolic and diastolic blood pressure in patients with mild or borderline hypertension. It also helps to lower plasma cholesterol. Soluble fibre from oats may help lower blood pressure, and a diet higher in fibre is advised if you are trying to lose weight, which can also help to lower blood pressure.
In addition to oats, other high-fibre foods such as beans, lentils, nuts, seeds, fruits, and vegetables can be incorporated into your diet. Lean sources of protein are lower in calories than fattier sources but are still filling, which can help with weight management, another factor in lowering blood pressure.
The DASH diet (Dietary Approaches to Stop Hypertension), which has been popular since the early 1990s, emphasizes plant-based foods and has been shown to lower blood pressure in numerous studies. This diet, along with lifestyle changes and medication, can be an effective approach to managing blood pressure.
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Dairy products
Several studies have shown that an increased intake of dairy products is associated with a reduced risk of hypertension. One study found that phosphorus from dairy products was associated with lower baseline blood pressure and a reduced risk of hypertension. Another study, which included almost 150,000 participants, found that a higher intake of dairy products, particularly whole-fat varieties, was linked to a lower risk of high blood pressure. Additionally, consuming at least two servings of whole-fat dairy per day was associated with an 11-12% lower risk of having both diabetes and high blood pressure.
The blood pressure-lowering effects of dairy products may be due to their influence on multiple organs and systems in the body. Dairy products have been shown to have beneficial effects on the vascular system, nervous system, and gut. For example, dairy products can increase endothelial eNOS/NO expression and restore endothelial function in hypertensive rats. They can also suppress the activated sympathetic nervous system and certain glia in the brain.
Bioactive components in dairy products, such as casein-derived tripeptides and milk-derived pentapeptides, are also thought to contribute to their blood pressure-lowering properties. Casein, a milk protein, facilitates calcium and phosphate absorption in the small intestine and is involved in the production of bioactive peptides. Small dairy peptides are produced through the digestion of milk protein in the human small intestine or through lactobacilli fermentation of milk.
While dairy products can be a beneficial part of a healthy diet, it is important to note that diet is not the only factor in reducing blood pressure. It is also crucial to take any prescribed medications and make other lifestyle changes, such as reducing salt intake, to effectively manage blood pressure.
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Lycopene-rich foods
Reducing High Blood Pressure with Diet
The DASH diet (Dietary Approaches to Stop Hypertension) has been scientifically demonstrated to reduce blood pressure. It involves eating mostly plant-based foods and has been popular since the early 1990s. The DASH diet is not the only way dietary changes can help lower blood pressure. Eating more fibre and lean protein can help with weight management, which in turn can help lower blood pressure. Dairy products, which are a good source of calcium, can also help lower blood pressure.
Lycopene is a powerful antioxidant found in red produce, such as tomatoes, watermelon, and pink grapefruit. It is also present in processed tomato products, such as tomato paste and tomato extract. Research has shown that lycopene can help maintain good blood pressure and reduce the risk of heart disease.
Lycopene is effective when heated and is easily added to your diet through both fresh and processed foods. It is also better absorbed by the body when combined with healthy fats like olive or coconut oil. A recent study found that consuming 14 milligrams of lycopene per day can improve fertility in healthy young men by about 40%.
In addition to its blood pressure-lowering benefits, lycopene has been linked to skin cancer prevention and improved oral and bone health. While supplements are available, it is best to get lycopene from food sources to gain the most benefits.
Clinical research conducted at Ben-Gurion University in Israel found that a daily intake of tomato extract significantly reduced both systolic and diastolic blood pressure in patients with mild to moderate hypertension after eight weeks. In another study, a small group of people with stage 1 hypertension who took 250 milligrams of tomato extract daily for eight weeks experienced a drop in both systolic and diastolic blood pressure.
Overall, including lycopene-rich foods in your diet is a smart way to help maintain good blood pressure and reduce the risk of associated health conditions.
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Omega-3 fatty acids
How Omega-3 Fatty Acids Help Reduce Blood Pressure
Research suggests that consuming omega-3 fatty acids in food or as dietary supplements may help reduce the risk of high blood pressure. The recommended daily intake of omega-3 fatty acids for healthy individuals is between 1.1 and 1.6 grams, depending on age and sex. However, consuming about 3 grams of omega-3 fatty acids per day may lead to a modest reduction in blood pressure, especially for those at high risk of developing cardiovascular disease.
Sources of Omega-3 Fatty Acids
Fatty fish, such as salmon, mackerel, herring, sardines, lake trout, and tuna, are excellent sources of omega-3 fatty acids. For individuals who do not consume fish, fish oil supplements are available. However, it is essential to consult with a healthcare professional before taking supplements, as they can advise on the appropriate dosage and potential side effects.
The DASH Diet
The DASH diet (Dietary Approaches to Stop Hypertension) is a well-known and scientifically backed approach to reducing high blood pressure. This diet has been popular since the early 1990s and emphasizes plant-based foods, lean protein sources, and dairy products. The DASH diet can effectively lower blood pressure in as little as two weeks, making it a recommended lifestyle change for those looking to manage their blood pressure naturally.
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Frequently asked questions
The DASH diet, Dietary Approaches to Stop Hypertension, has been scientifically demonstrated to reduce blood pressure. It is a flexible and balanced eating plan that helps create a heart-healthy eating style for life.
Some foods that can help lower blood pressure include:
- Fatty fish, which are an excellent source of omega-3 fats.
- Fruits and vegetables, such as blueberries, strawberries, tomatoes, and broccoli.
- Nuts, especially walnuts, have been shown to help manage hypertension.
- Dairy products, such as milk and yoghurt, which contain calcium.
- Wholegrains such as brown rice, wholemeal bread, and oats, which are high in fibre.
In addition to diet, there are other lifestyle modifications that can help reduce blood pressure. These include:
- Reducing salt intake to no more than 6g per day.
- Taking prescribed medications, such as angiotensin-converting enzyme (ACE) inhibitors.
- Increasing physical activity and managing weight.
