It may be used short-term for the right indication, but if supplementation is planned longer-term, knowing B12 status is important. Taking folic acid in the presence of B12 deficiency can partially correct anemia and delay recognition of neurological complications—this “masking” risk is a key clinical control point. If symptoms such as numbness, tingling, balance issues, or cognitive changes are present, B12 evaluation becomes even more critical. The safest practice is to monitor folate and B12 together rather than treating folic acid as a standalone solution.