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I've also seen people spend money on gray-market versions that accomplished nothing
concerns regarding unpredictable absorption The mechanism for the oral route is based on passive absorption of vitamin B 12 (without binding to intrinsic factor) as well as active absorption (following binding to intrinsic factor, if present, e.g
Health 5 (2), 020415
[67] [68] Epidemiology [edit] PA is estimated to affect 0.1% of the general population and 1.9% of those over 60, accounting for 2050% of B 12 deficiency in adults
Valashedi et al
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