Poor folic acid metabolism in men may affect fertility, megaloblastic anemia, and increase the chances of having cancer. 1. Affecting fertility: When the folic acid level in men is low, it may lead to reduced sperm count, poor sperm quality, dead sperm, and so on, which in turn affects fertility. 2. Megaloblastic anemia: when poor folic acid metabolism exists for a long time in men’s body, it may develop into megaloblastic anemia, which makes the patients suffer from dizziness, palpitations, fatigue, dyspnea and other symptoms. 3. Increase the chance of inducing cancer: there is a correlation between DNA repair and oncogenes in the body and folic acid, when there is a poor metabolism of folic acid, it may increase the chance of inducing cancer. Poor folic acid metabolism in men has a great impact on the body, and it is recommended to go to the hospital in time to find out the cause and follow the doctor’s instructions to treat the cause.