Folic acid can be taken by men with various causes of folic acid deficiency and megaloblastic anemia caused by folic acid deficiency. The main ingredient of folic acid tablets is folic acid, which is a substance necessary for the growth and reproduction of body cells. In addition to preventive medicine for pregnant and lactating women, it can also be used for folic acid deficiency and megaloblastic anemia caused by folic acid deficiency due to various reasons (e.g., chronic hemolytic anemia), and can also be taken by men if they have the above mentioned diseases. Adverse effects of this product is relatively small, rare allergic reactions, but long-term use of the drug may appear nausea, fear of food, abdominal distension and other gastrointestinal symptoms, when the dosage is too large, it can also make the urine yellow. In addition, this product should be used after the diagnosis is clear, for vitamin B ₁ ₂ deficiency caused by megaloblastic anemia can not be treated with folic acid alone, the specific use of the recommended under the guidance of a physician.