Potassium’s effect was specifically linked to a reduced risk of ischemic strokes, the ones caused by a blockage in an artery to the brain. Ischemic strokes account for about 80 percent of all strokes.
Some people need to be careful about potassium, however, including those with kidney disease, or who are on certain blood pressure drugs.
A medium sweet potato packs 12 percent of your daily potassium, a mineral that plays an important role in heart health by keeping your sodium levels in check.
High levels of potassium cause a person to excrete more sodium in the urine, which reduces blood pressure.
“It also relieves pressure on blood vessels,” said registered dietician Sarah Pflugradt.
“And both of those things can help reduce your risk for stroke.”