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A member asked:

My aunts kidney functioning (gfr) is 40 (low). she is supplementing with vitamin b12 (1,000mcg) 1,600% rda daily. is this safe with ckd??

A doctor has provided 1 answer

Not doing any good: At a gfr of 40 taking large dose of B12 is not doing any harm, but not doing any good either. It is just lightening your aunt's wallet.

Answered 11/5/2017

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