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Vitamin B12 is a water-soluble vitamin and is essential for the proper function of the brain, nervous system, and the formation of red blood cells

Therefore, BBB rejuvenation and repair is important for maintenance of brain health

In other cases, if your B level is normal and youre just low in the other Bs, your provider might intentionally choose a B-Complex without B to avoid unnecessary injections

These effects have been demonstrated in various models of neurotoxicity and oxidative stress, including D-galactose-induced cognitive deficits [28], scopolamine- and cisplatin-induced cerebral oxidative damage [29] and amyloid-beta-induced memory impairment [30]

(PubMed) Czeizel AE, Dudas I