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Research has particularly highlighted the importance of NAD+ in skeletal muscle, where sirtuin activation promotes mitochondrial biogenesis and oxidative metabolism while reducing insulin resistance

Brain & Nervous System Function B12 is critical for maintaining the myelin sheath that protects nerve fibers, supporting cognitive function, memory, and neurological health

The National Institutes of Health confirms that B12 deficiency directly impairs myelin production-the protective coating around nerve fibers that speeds up brain communication

Studies show it activates stem cell factor signaling and prolongs the anagen (growth) phase of the hair cycle