The American Heart Association claims that a daily, low-dose of aspirin a day can prevent heart attacks and stroke. The tablet has been linked to reducing the risk of internal clotting, which is related to these two health conditions. Because Willow Bark and aspirin are so closely related, researchers believe taking willow bark can help prevent heart attacks as well. “White Willow bark contains salicylates,” which means it has the same effect on the heart as aspirin does, according to Brennecke. Although drinking white willow bark tea can thin the blood like aspirin — making it less likely to clot — it’s important to know how much salicylates you get in each cup and monitor that amount.