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Contraindications: Some peptides may have contraindications for certain medical conditions

In these situations, patients may have high B12 on blood work but still exhibit neurological symptoms of deficiency (tingling, numbness, cognitive changes)

On a deeper level, it seems that vitamin B12's relationship with hair loss or hair growth seems to stem from its necessary function for "DNA synthesis, neurological function, and red blood cell formation," which are all important factors in helping hair cells generate, as well as keeping hair follicles, the base of the hair on the scalp, oxygenated and fed with enough nutrients from digestion as explained further below

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B12 is crucial for red blood cell formation, neurological health, DNA synthesis, energy metabolism, and mood regulation