Injections bypass the gastrointestinal tract and are the standard treatment for pernicious anaemia and severe deficiency in the UK
10.1096/fj.13-235614 FASEB J
Also, dont forget to include units and cost
Appelman B, Charlton BT, Goulding RP, Kerkhoff TJ, Breedveld EA, Noort W, et al
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9.4 Probiotics in GI disorders Probiotics hold considerable promise as therapeutic agents for a spectrum of medical conditions, encompassing lactose intolerance, GI and urogenital infections, ulcerative colitis, neoplasms of the digestive tract, and Crohns disease, as shown in Table 3