Diet to Lower Blood Pressure: The DASH Eating Plan
The most effective diet to lower blood pressure is the DASH diet, which stands for Dietary Approaches to Stop Hypertension. It emphasizes fruits, vegetables, whole grains, lean proteins, and low-fat dairy while limiting sodium, saturated fat, and added sugars. Clinical trials show it can reduce blood pressure as much as some medications.
What Is the DASH Diet?
The DASH diet was developed by scientists to help lower blood pressure without medication. It is a flexible eating plan that does not require special foods, but rather sets daily and weekly nutritional goals. The plan focuses on foods rich in potassium, calcium, magnesium, fiber, and protein, which work together to reduce blood pressure. According to the National Heart, Lung, and Blood Institute, the DASH eating plan includes:
- Vegetables, fruits, and whole grains
- Fat-free or low-fat dairy products, fish, poultry, beans, nuts, and vegetable oils
- Limiting foods high in saturated fat, such as fatty meats, full-fat dairy, and tropical oils
- Limiting sugar-sweetened beverages and sweets
The standard DASH diet limits sodium to 2,300 milligrams per day, while a lower-sodium version limits it to 1,500 milligrams. Most Americans consume about 3,300 milligrams daily, so even moving toward the standard limit can help. You can also explore What to Expect from a 14-Day Liquid Diet for a closer comparison.
How the DASH Diet Lowers Blood Pressure
The DASH diet targets several mechanisms that influence blood pressure. First, reducing sodium decreases fluid retention, which lowers pressure on blood vessel walls. Second, increasing potassium, magnesium, and calcium helps relax blood vessels and counteracts sodium's effects. Third, the overall nutrient profile supports healthy blood vessel function and reduces inflammation. A major clinical trial found that participants following DASH saw significant blood pressure drops, sometimes comparable to medication, according to Harvard Health.
Beyond blood pressure, DASH is linked to lower risks of heart disease, stroke, heart failure, type 2 diabetes, and colorectal cancer. It is not specifically a weight-loss diet, but many people find it easier to manage weight because of its emphasis on whole, filling foods.
DASH Diet Serving Guidelines
The following table shows daily and weekly servings for a 2,000-calorie DASH eating plan, based on recommendations from the NHLBI.
| Food Group | Daily Servings | Serving Size Examples |
|---|---|---|
| Grains | 6–8 | 1 slice bread; 1 oz dry cereal; 1/2 cup cooked grain or pasta |
| Vegetables | 4–5 | 1 cup raw leafy; 1/2 cup cooked |
| Fruits | 4–5 | 1 medium fruit; 1/2 cup fresh, frozen, or canned |
| Low-fat or fat-free dairy | 2–3 | 1 cup milk or yogurt; 1.5 oz cheese |
| Lean meats, poultry, fish | 6 or fewer | 3 oz cooked; 1 egg |
| Nuts, seeds, legumes | 4–5 per week | 1.5 oz nuts; 2 tbsp seeds or nut butter; 1/2 cup cooked legumes |
| Fats and oils | 2–3 | 1 tsp vegetable oil; 1 tbsp mayonnaise |
| Sweets | 5 or fewer per week | 1 tbsp sugar; 1/2 cup sorbet |
For lower calorie needs (1,400–1,600 calories), servings are slightly reduced. The NHLBI provides worksheets to compare your current eating habits to DASH targets.
Foods to Limit or Avoid
To lower blood pressure, limit foods high in sodium, saturated fat, and added sugars. Key foods to avoid or reduce include: Our breakdown of How Do You Know If You Have High Blood Pressure covers the related details.
- Processed meats like bacon, sausage, and deli meats
- Canned soups and frozen meals with high sodium
- Salty snacks such as chips and pretzels
- Full-fat dairy products and fatty meats
- Tropical oils like coconut and palm oil
- Sugar-sweetened beverages and sweets
Alcohol should also be limited: no more than two drinks per day for men and one for women, as more can raise blood pressure, according to the American Heart Association.
Practical Tips for Following the DASH Diet
Transitioning to DASH can be gradual. Start by adding a serving of vegetables or fruit to each meal. Choose whole grains over refined ones. Swap full-fat dairy for low-fat versions. Use herbs and spices instead of salt to flavor food. Read nutrition labels to check sodium content, aiming for foods with less than 5% daily value per serving. When eating out, request sauces and dressings on the side and choose grilled or steamed options.
Expect your taste buds to adjust over a few weeks; foods may taste bland initially, but you will likely come to prefer less salt. The DASH diet is flexible and can fit various budgets and cultural preferences, making it sustainable long-term.
When to Seek Medical Advice
While diet can significantly lower blood pressure, it is not a substitute for medical care. If you have high blood pressure, work with your healthcare provider to monitor your numbers and adjust medications as needed. Seek immediate medical attention if you experience symptoms like severe headache, chest pain, shortness of breath, or vision changes, which could indicate a hypertensive crisis. The CDC recommends talking with your health care team about eating a variety of foods rich in potassium, fiber, and protein and lower in sodium and saturated fat.