Folic acid and folate refer to the water-soluble B vitamin. Folate occurs naturally in fruits and vegetables and has various roles in your body, particularly helping to form red blood cells. Folic acid is commonly found in supplements and fortified foods. Fruits and vegetables stored at room temperature and exposed to light may lose 70% of their folate. Cooking can also destroy up to 35% of the folate content of vegetables.
Throw your veg in the pan soon after chopping them up to avoid losing all the good stuff in them. Vegetables can lose nutrients once exposed to light and air.