Supplementing folic acid quantitatively in advance starts from the first three months of pregnancy. A daily supplement of 400 micrograms of folic acid is a more appropriate amount. Excessive folic acid can mask the symptoms of vitamin B12 deficiency, interfere with zinc metabolism, and cause zinc deficiency in pregnant women. The maximum daily supplement amount cannot exceed 1000 micrograms or 1 mg. Folic acid is a water-soluble B vitamin. Pregnant woman on leaves