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A 57-year-old woman is seen in an outpatient clinic, where her blood pressure reading is 155/95 mm Hg. Dietary therapy is recommended. Dietary changes that have been shown to reduce blood pressure include reduced sodium intake, reduced caloric intake (for weight loss), and diets high in fruits, vegetables, low-fat dairy products, whole grains, poultry, fish, nuts, and unsaturated vegetable oils.
Sacks et al. (2010) studied this question.