Can B12 help with Schlaf?

Whether vitamin B12 can help with sleep is not clearly supported by evidence. B12 is involved in melatonin synthesis and circadian rhythm regulation. A deficiency can cause fatigue and sleep disturbances, and correcting that deficiency may improve sleep. However, for individuals with normal B12 levels, supplementation has not been shown to enhance sleep quality. Most studies report minimal or no benefit. B12 is often taken with other B vitamins, making it hard to isolate effects. A blood test to check for deficiency is recommended before supplementing. Without a confirmed deficiency, B12 is unlikely to improve sleep. Caveat: High doses are generally safe but not a proven sleep aid.