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Ideally, blood tests (including full blood count, serum B12, folate, and possibly anti-intrinsic factor antibodies if pernicious anaemia is suspected) should be performed before starting supplements, as supplementation can affect test results

doi: 10.3390/cancers11010053

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Typically, the type of dermal filler used to treat facial skin determines how long the results last
Some people may need weekly shots at first, then monthly for maintenance

There is no validated lab marker for NNMT inhibition outside research labs