| | Guideline | Diet adaptation | Class of recommendation and level of evidence |
| | 2017 ACC [10] | A heart-healthy diet, such as the DASH (dietary approaches to stop hypertension) diet, that facilitates achieving a desirable weight is recommended for adults with elevated BP or hypertension. Consume a diet rich in fruits, vegetables, whole grains, and low-fat dairy products, with reduced content of saturated and total fat | I A | | 2018 ESC [11] | Increased consumption of vegetables, fresh fruits, fish, nuts, and unsaturated fatty acids (olive oil); low consumption of red meat; and consumption of low-fat dairy products are recommended | I A | | 2019 NICE [12] | Ask about people’s diet and exercise patterns because a healthy diet and regular exercise can reduce blood pressure | NA | | 2020 CAN [13] | It is recommended that hypertensive patients and normotensive individuals at increased risk of developing hypertension consume a diet that emphasizes fruits, vegetables, low-fat dairy products, whole grain foods rich in dietary fibre, and protein from plant sources that is reduced in saturated fat and cholesterol (dietary approaches to stop hypertension) (DASH) diet | Grade B | | 2020 ISH [14] | Eating a diet that is rich in whole grains, fruits, vegetables, polyunsaturated fats, and dairy products and reducing food high in sugar, saturated fat, and trans fats, such as the DASH diet. Increase intake of vegetables high in nitrates known to reduce BP, such as leafy vegetables and beetroot | NA |
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