Folic acid does not act like a stimulant or an “energy drink.” But if fatigue is driven by folate-deficiency anemia, low oxygen-carrying capacity can make you feel weak and low-performance—so correcting the deficiency may feel like “energy returning.” If folate status is normal, noticeable energy gains are unlikely. In practice, low energy is often multi-factorial: sleep, stress, iron status, vitamin B12, vitamin D, thyroid function, and overall diet patterns frequently matter more than a single supplement.