Normally there are many sources of folate in food, including for vegans, but certain medications, some unavoidable, cause deficiencies. (nutritionfacts.org)
Healthy vegan diets are high in folate so it seems possible and certainly preferable to get this nutrient from food rather than supplements. (nutritionfacts.org)
Everyone needs a diet that includes folic acid, regardless of whether or not they are pregnant, as folate deficiency can cause serious health problems. (verywellfamily.com)