How does sodium intake influence blood pressure and what dietary approach helps manage hypertension?

• A. Sodium reduction has no impact when following a high-fat diet.
• B. Sodium intake has no effect on blood pressure.
• C. High sodium intake can raise blood pressure; the DASH diet with sodium reduction helps manage hypertension.
• D. Increased sodium lowers blood pressure.

Answer: (C)

Sodium intake influences blood pressure by changing fluid balance and how hard the heart has to work. When sodium consumption is high, the body retains more water to keep the concentration of salts stable, which increases blood volume and puts more pressure on the blood vessel walls. Over time, this can raise both systolic and diastolic blood pressure.

The best approach to manage hypertension is to combine reducing sodium with the DASH dietary pattern. The DASH diet emphasizes fruits, vegetables, low-fat dairy, lean proteins, and whole grains, which provides more potassium, calcium, and magnesium. These minerals help balance sodium’s effects and improve blood vessel function. Reducing sodium enhances the benefits of DASH, leading to greater drops in blood pressure than either strategy alone. Guidelines commonly suggest aiming for moderate sodium reduction (often around 1500 mg/day for many with hypertension) while following the DASH framework for the strongest nonpharmacologic impact.