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Czechia Greater than 99.8 % purity confirmed by COA Assay content verified at 124.6 mg Identity confirmed through MS Deconvolution Endotoxin level below 0.001 EU/mg No detectable heavy metals or microbial contamination For research use only not for human or veterinary use For laboratory research only

PMID 33204422

McGowan, M.D., Ph.D., Julio Rosenstock, M.D., Marie T.D

Each layer covers something the others don't

Elderly people are particularly at risk of deficiency because of the increasing prevalence with increasing age of atrophic gastritisassociated food-cobalamin malabsorption, PA, and due to drug intake for co-morbidities