With that in mind, these are the biggest foods dietitians and a cardiologist recommend focusing on to lower your stroke risk. “Green leafy vegetables can lower stroke risk because of their high content of nitrates,” she says. “They also have vitamins, minerals, and fiber which are associated with a lower stroke risk,” Angelone says. Rich in catechins that reduce oxidative stress, sipping green tea may help lower your stroke risk, Keatley says. Rich in catechins that reduce oxidative stress, sipping green tea may help lower your stroke risk, Keatley says.