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J Pharmacol Exp Ther 238:5461 Atkuri KR, Mantovani JJ, Herzenberg LA, Herzenberg LA (2007) N -Acetylcysteinea safe antidote for cysteine/glutathione deficiency
Seizure medications such as phenytoin and phenobarbital, as well as diabetes medications like metformin, can lower B12 levels over time
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The studies were done on rodents, the b12 isnt available in the kidneys for very long, weeks, not months it seems.and whether humans with b12 deficiency because of a broken system can access this b12 we wont know without further research
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