Vitamin B12 may have potential benefits for individuals with narcolepsy, though it is not a direct treatment for the condition. B12 plays a crucial role in energy production, neurological health, and the regulation of the sleep-wake cycle, which can indirectly support those managing excessive daytime sleepiness. Some studies suggest a link between low B12 levels and fatigue or sleep disturbances, making supplementation helpful if a deficiency is present. However, the effectiveness of B12 in treating narcolepsy symptoms specifically has limited scientific backing. It is best to consult a healthcare provider before starting any supplementation to ensure it aligns with individual health needs and treatment plans.