Eating purple sweet potato in winter helps prevent diseases (2)

2. The rich potassium and iron content in purple sweet potato can carry oxygen into the body, and stabilize blood pressure.

Potassium is an important nutrient in the human body that plays a vital role in maintaining a normal metabolism of sugar and protein. It helps relax blood vessels, and promote sodium excretion, making it indispensable in the process of stabilizing blood pressure. Iron involves in the formation and maturation of cells in human body that maintain normal hematopoietic function.

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