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How the two eating patterns work
DASH: food groups and measurable targets
DASH stands for Dietary Approaches to Stop Hypertension. The National Heart, Lung, and Blood Institute (NHLBI) describes it as a flexible plan built around common foods, not specialty products. It emphasizes vegetables, fruit, whole grains, low-fat or fat-free dairy, fish, poultry, beans, nuts and vegetable oils. It limits foods high in saturated fat, sweets and sugar-sweetened drinks. NHLBI’s DASH plan gives sample daily targets for a 2,000-calorie day: 6–8 grain servings, 4–5 vegetable servings, 4–5 fruit servings and 2–3 low-fat or fat-free dairy servings. Calorie needs affect serving targets, so these examples are not universal portions.
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For sodium, NHLBI gives a target of 2,300 mg per day, or 1,500 mg per day for greater blood-pressure reduction. Its guidance on living with DASH also describes 4,700 mg of potassium daily as part of the plan. That figure is plan guidance, not an individualized recommendation; ask a clinician for advice if a health condition or medication affects what is appropriate for you. NHLBI recommends reading nutrition labels and offers menus, recipes and planning materials.
Mediterranean-style: a flexible pattern
Mediterranean-style eating generally centers on vegetables, fruit, beans and other legumes, nuts, whole grains, fish or seafood, and unsaturated fats such as olive oil. It commonly limits red and processed meat, sugary sweets and highly processed foods; some versions also include less dairy. There is no single fixed menu: food traditions differ among Mediterranean countries, and adaptations differ too. Olive oil is common, but it is not the only acceptable source of healthy fats; nuts and avocados are examples of other options. The American Heart Association’s overview discusses the pattern and ways to get started.
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Wine is not required. Federal guidance cited by the American Heart Association says that people who do not drink should not start, and that less alcohol is better for health.
Key differences at a glance
| What matters | DASH | Mediterranean-style |
|---|---|---|
| Structure | Includes daily and weekly food-group serving examples, adjusted for calorie needs. | Flexible overall pattern; foods and habits vary across regional versions. |
| Sodium | NHLBI gives targets of 2,300 mg or 1,500 mg daily. | The Mediterranean pattern assessed by the AHA did not explicitly address added salt. |
| Food emphasis | Fruit, vegetables, whole grains, low-fat dairy, beans, nuts, fish, poultry and vegetable oils. | Plant foods, legumes, nuts, whole grains, fish and olive oil; often less red meat. |
| Often a practical fit for | Someone who wants measurable food and sodium targets, particularly when blood-pressure management is a priority. | Someone who prefers a flexible pattern organized around plant foods and unsaturated fats. |
| Personal adaptation | Adjust calorie targets and food choices; get clinical or dietitian guidance when a health condition affects diet. | Adapt foods to culture, preferences, budget and availability; it is not one fixed menu. |
What the evidence says—and does not say
DASH has been tested in controlled feeding studies. In one trial, 459 adults followed three diets, each with 3,000 mg of sodium daily; after eight weeks, DASH lowered blood pressure the most among the diets compared. In the DASH-Sodium trial, 412 adults were assigned sodium levels of 3,300 mg, 2,300 mg or 1,500 mg daily. NHLBI reports that DASH combined with 1,500 mg of sodium lowered blood pressure more than the typical American diet at each tested sodium level. These short-term trial findings do not guarantee an individual’s long-term results. NHLBI also reports improvements in LDL cholesterol and other lipid measures in DASH trials. See its summary of DASH health benefits.
Both patterns align strongly with the AHA’s heart-healthy dietary guidance. In a 2023 comparison, the AHA scored DASH 100 and Mediterranean-style eating 89 on a 1–100 scale for alignment with its guidance. The score evaluates how defined implementations of the patterns match the guidance; it is not a head-to-head clinical trial or a prediction of what will happen to an individual. The Mediterranean version assessed included moderate alcohol and did not address added salt, which helps explain why the score should not be read as a universal verdict on every way of eating Mediterranean-style. The AHA describes the comparison in its report on how 10 popular diets scored and its summary of the dietary-pattern analysis.
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The cited evidence does not establish that either pattern is universally superior in long-term clinical outcomes. The AHA’s statement chair, Christopher D. Gardner, Rehnborg Farquhar Professor of Medicine at Stanford University, said: “If implemented as intended, the top-tier dietary patterns align best with the American Heart Association’s guidance and may be adapted to respect cultural practices, food preferences and budgets to enable people to always eat this way, for the long term.”
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to choose the pattern you can maintain
- Set your priority. If explicit sodium and serving targets would help you act on a blood-pressure goal, DASH provides them. If you prefer a flexible framework centered on plant foods and unsaturated fats, Mediterranean-style eating may feel more natural.
- Look at your actual meals. Identify changes you could repeat using the foods you enjoy and can get. Either pattern can be adapted to culture, budget and availability; neither requires specialty foods.
- Use practical support. For DASH, NHLBI provides sample menus and recipes, and recommends checking labels for sodium. For Mediterranean-style eating, start with changes that fit your routine, such as adding vegetables, beans, whole grains or fish where available.
- Get individualized advice when needed. If a medical condition, medication or other personal health factor affects your diet, consult a clinician or registered dietitian before adopting targets such as sodium or potassium goals.
Neither name guarantees a particular menu or outcome. The better choice is the pattern whose useful structure and food choices you can sustain—not a ranking score treated as a personal prescription.
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