The DASH diet is an eating pattern specifically designed to lower blood pressure. DASH stands for Dietary Approaches to Stop Hypertension, and it was developed through research funded by the National Heart, Lung, and Blood Institute. Unlike many popular diets, it wasn’t created by a celebrity or a wellness brand. It came out of clinical trials showing that certain combinations of foods could drop blood pressure by measurable amounts, sometimes within weeks.
How the DASH Diet Works
The core idea is straightforward: eat more foods rich in potassium, magnesium, calcium, and fiber while cutting back on sodium and saturated fat. These nutrients work together to relax blood vessels, help your body flush excess sodium, and reduce the strain on your cardiovascular system. Rather than focusing on a single “superfood,” the DASH diet relies on the overall pattern of what you eat day after day.
In the original DASH trial, people who followed this eating pattern lowered their systolic blood pressure (the top number) by an average of 5.5 points and their diastolic pressure (the bottom number) by 3 points. When researchers combined the diet with lower sodium intake, the results were even stronger: systolic pressure dropped by nearly 9 points compared to a typical American diet with higher sodium. That’s a meaningful reduction, enough to move some people from a hypertension diagnosis back into a normal range.
What You Eat on the DASH Diet
The DASH diet is built around a 2,000-calorie daily framework, though you can adjust portions up or down depending on your needs. The daily targets look like this:
- Grains: 6 to 8 servings, with an emphasis on whole grains like brown rice, oatmeal, and whole wheat bread
- Vegetables: 4 to 5 servings
- Fruits: 4 to 5 servings
- Low-fat or fat-free dairy: 2 to 3 servings, such as skim milk, yogurt, or reduced-fat cheese
- Lean meats, poultry, and fish: 6 or fewer ounces per day
- Nuts, seeds, and legumes: 4 to 5 servings per week
- Fats and oils: 2 to 3 servings per day
- Sweets and added sugars: 5 or fewer per week
The pattern is heavy on plants but not vegetarian. You still eat meat, just less of it, and you lean toward poultry and fish over red meat. The emphasis on low-fat dairy is one of the features that sets DASH apart from other heart-healthy diets.
Two Sodium Levels
The DASH diet comes in two versions based on how much sodium you consume. The standard version caps sodium at 2,300 milligrams per day, which is roughly one teaspoon of table salt. The lower-sodium version drops that to 1,500 milligrams, which the Institute of Medicine considers the level most people should aim for.
Both versions lower blood pressure, but the difference between them matters. In the DASH-Sodium trial, each step down in sodium intake produced additional drops in blood pressure. People on the DASH diet who ate 1,500 milligrams of sodium daily saw their systolic pressure fall by 8.9 points compared to those eating a typical diet with higher sodium. Even reducing from the highest to the middle sodium level made a noticeable difference. The takeaway: any reduction in sodium helps, and more reduction helps more.
Benefits Beyond Blood Pressure
While the diet was designed for hypertension, the benefits extend further. Follow-up research from the original DASH trial showed that the eating pattern also lowers LDL cholesterol, the type most closely linked to heart disease. A later study called OmniHeart found that swapping about 10% of daily calories from carbohydrates to either protein or unsaturated fat improved both blood pressure and cholesterol levels even more than the original DASH plan.
The diet also reduces the risk of type 2 diabetes and overall heart disease. A modified version of DASH has been studied specifically for people already living with type 2 diabetes, with positive results. However, one thing that doesn’t seem to matter much is glycemic index. A study called OmniCarb found that choosing low-glycemic foods within a DASH-style diet didn’t provide extra benefits for blood pressure, cholesterol, or insulin resistance. In other words, the overall food pattern matters more than whether you pick one type of grain over another.
The American Heart Association’s 2026 dietary guidance lists the DASH diet alongside Mediterranean and pescetarian diets as patterns that support cardiovascular health and healthy weight maintenance.
DASH Diet vs. Mediterranean Diet
These two diets overlap significantly. Both emphasize vegetables, fruits, whole grains, and limited red meat. But they differ in a few key ways:
- Fat: The Mediterranean diet embraces healthy fats, especially olive oil and nuts, as central ingredients. The DASH diet limits overall fat intake and focuses on keeping saturated fat low.
- Dairy: DASH emphasizes low-fat dairy as a calcium source. The Mediterranean diet includes moderate amounts of full-fat yogurt and cheese but doesn’t treat dairy as a cornerstone.
- Sodium: DASH has explicit sodium limits (2,300 or 1,500 mg per day). The Mediterranean diet doesn’t specifically restrict sodium.
- Alcohol: The Mediterranean diet traditionally includes optional moderate wine consumption. DASH doesn’t typically include alcohol.
Both diets support heart health, but they get there differently. The Mediterranean diet leans on monounsaturated fats and omega-3 fatty acids from fish. The DASH diet lowers blood pressure primarily through sodium restriction and high potassium intake. If your main concern is blood pressure specifically, DASH has stronger direct evidence. For overall cardiovascular protection, both perform well.
Making Low-Sodium Food Taste Good
The biggest practical hurdle with the DASH diet is the sodium limit. If you’re used to salting food generously or eating a lot of packaged meals, 2,300 milligrams feels restrictive, and 1,500 milligrams feels severe. The food can taste flat at first. This is temporary. Your taste buds adjust within a few weeks, and foods that once seemed bland start to taste normal.
In the meantime, herbs and spices do the heavy lifting. Rosemary and thyme work well with poultry and fish. Cumin and paprika add depth to vegetables and grains. Fresh garlic, lemon juice, and vinegar brighten flavors without adding sodium. Crushing or rubbing dried herbs before adding them releases more flavor. You may need to use slightly more seasoning than a recipe calls for, since salt amplifies other flavors and you’re removing that amplifier.
One easy swap: replace garlic salt and onion salt with garlic powder and onion powder. These taste nearly identical in cooking but contain no sodium. Salt-free seasoning blends (Italian seasoning, Cajun blends, lemon pepper) are widely available and can make the transition much easier. Just check labels carefully, because some “salt substitutes” use potassium chloride, which can be problematic for people with kidney issues.
Who the DASH Diet Is Best For
The DASH diet is one of the few eating patterns with strong clinical evidence behind it for a specific health outcome. It works for people with high blood pressure, people with prehypertension who want to prevent progression, and people with normal blood pressure who want to keep it that way. The blood pressure benefits show up regardless of age, sex, or race, though the reductions tend to be larger in people who start with higher blood pressure.
It’s also a reasonable general-purpose eating pattern. The food groups and portions align closely with what most nutrition guidelines recommend, so even if blood pressure isn’t your primary concern, the DASH framework provides a structured, balanced approach to eating. The emphasis on whole foods, lean protein, and limited sweets checks most of the boxes that matter for long-term health.