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Description
A B12 deficiency can cause demyelination, leading to neuropathy with neurological signs like numbness, pins and needles, and muscle weakness, especially in the feet and hands

The Certificate of Analysis was available as expected

10.1038/s41467-025-60844-9 8 BoutouyrieP.ChowienczykP.HumphreyJ

too little may not offer the desired therapeutic benefit

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Heres how it usually works: Before starting, you may receive a quick consultation and a lab test to evaluate your B12 levels
