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Even in healthy people, oral B12 absorption is only 5070% bioavailable

No, AHK-Cu should never be mixed with other peptides in the same syringe or vial because copper ions can form unintended coordination complexes with other peptide sequences, altering the biological activity of both compounds

W.et al (2017)

A re-assessment of treatment with a tyrosine kinase inhibitor (imatinib) on tissue sparing and functional recovery after spinal cord injury

Anyone with digestive conditions affecting absorptionincluding Crohns disease, celiac disease, or history of procedures affecting stomach or intestinesneeds the digestive bypass injections provide

Most researchers report initial symptom improvement within 1 to 4 weeks, depending on severity and protocol