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doi: 10.1016/j.actbio.2021.04.013 101 MachadoVSCamponogaraCOliveiraSMBaldisseraMDSagrilloMRDa GundelSSet al

further notes that NICE CKS guidance states that treatment of B12 deficiency in people with neurologic involvement should include injections on alternate days until there is no further improvement

And a lot of people get injection fatigue

J Clin Invest 113 : 2527 Heffernan M et al

A cloudy, particulate, or strongly off-color solution is a sign to stop using that vial and check storage, BAC water, and reconstitution technique
is supported by the CAS project (CAS-WX2022GC-0104)