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That said, the clinical trial doses (1mg/day) are higher than what most research protocols use today and there's good reason for that gap, which we'll get into

Oral absorption is considered too undependable to rely on in patients with pernicious anemia or other conditions resulting in malabsorption of vitamin B12

For severe deficiencies, it can take even longer, since your vitamin stores are extremely depleted

Product Specifications CAS Number : 221231103 Peptide Sequence : TyrLeuArgIleValGlnCysArgSerValGluGlySerCysGlyPheOH Molecular Weight : 1815.10 g/mol Chemical Formula : CHNOS Purity : 99% (HPLC) Packaging Format : 5 mg lyophilized powder in a researchgrade glass vial Storage Conditions (unreconstituted) : Store at 20 C, avoid light exposure