Elderly people can take folic acid for a long time, folic acid belongs to vitamins, mainly in the color of darker green vegetables, if the processing method is not appropriate folic acid will be lost, the elderly take folic acid has a lot of benefits: 1, appropriate amount of supplemental folic acid can prevent as well as delay Alzheimer’s disease. 2, people to the old age after the hematopoietic function will be affected by a certain amount of anemia, folic acid is the raw material of hematopoiesis, a lack of folic acid will be Folic acid and vitamin B12 can effectively reduce the level of homocysteine in the blood, high homocysteine is a risk factor for cardiovascular, cerebrovascular and peripheral vascular diseases, so folic acid can reduce the risk of myocardial infarction and cerebral infarction. Folic acid is a water-soluble vitamin that is relatively safe and does not have a strict regimen. In addition to regular testing of folic acid levels, it should be taken on an individualized basis according to the primary disease.