Folbiol is a folic-acid–containing product used to support folate status—commonly in folate deficiency and, under clinician guidance, in preconception planning. The goal is to replenish folate stores to support red blood cell production and cellular repair pathways. The key is clear indication: using folic acid for “any fatigue” is not a sound strategy because fatigue can stem from iron deficiency, B12 deficiency, thyroid issues, sleep disruption, or stress. Dose and duration should be individualized to the clinical scenario.