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Because 10 to 30 percent of older people may be unable to effectively absorb vitamin B 12 naturally occurring in foods, those older than 50 years should meet their RDA mainly by consuming foods fortified with vitamin B 12 or a supplement containing vitamin B 12
A design that aims to reduce side effects seen with regular B12 shots
Some integrative practitioners use IV glutathione which can increase glutathione levels for a short time, but since the IVs are not done daily, it is difficult to keep glutathione levels elevated
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