Pure Lab Bioactive B12 5000mcg Sublingual 60 tabs

Methylcobalamin is the biologically-active form of vitamin B-12. Absorption of this essential vitamin depends on adequate production of intrinsic factor, secreted by a healthy stomach. However, neither dietary sources nor ordinary supplements containing vitamin B-12 will help an individual with low / no intrinsic factor secretion. Again, low stomach acid secretion and some auto-immune disorders are just some of the factors that can reduce the secretion of this special substance.

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