Narcolepsy is a neurological sleep disorder linked mainly to the loss of hypocretin (orexin), a brain chemical that regulates wakefulness. In many cases, this loss is thought to involve an autoimmune response, genetics, or brain injury. However, certain vitamin deficiencies such as vitamin B12, vitamin D, or iron deficiency can cause severe fatigue, sleepiness, and concentration problems that may mimic narcolepsy symptoms. Correcting these deficiencies can improve energy levels but will not cure narcolepsy. Proper diagnosis by a sleep specialist is essential for accurate treatment and management.
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