For Folate and Potassium

Fennel is a very good source of folate, a B vitamin that is necessary for the conversion of a dangerous molecule called homocysteine into other, benign molecules. At high levels, homocysteine, which can directly damage blood vessel walls, is considered a significant risk factor for heart attack or stroke. Fennel is also a very good source of potassium, a mineral that helps lower high blood pressure, another risk factor for stroke and heart attack.