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A person who is suffering from high blood pressure should cut down on _______

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A person who is suffering from high blood pressure should cut down on _______

(a) sodium

(b) potassium

(c) calcium

(d) magnesium

I got this question in an interview for job.

This question is from Nutrition in division Rehabilitation and Recovery of Clinical Science

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Correct option is (a) sodium

The best I can explain: Sodium and potassium are used by the body to conduct impulses but unlike potassium, sodium is a much smaller ion. This means it has higher electropositivity and a higher capacity to attract negatively charged ions. It attracts water molecules and causes water retention, something which is very harmful to a patient suffering from high blood pressure. Thus, their sodium intake is reduced so that the excess water is not held back in blood and the pressure on the heart to circulate the larger volume of blood reduces.

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