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Note that Zinc Thymulin should be used at different times than GHK-Cu (morning versus evening, or alternating days) since zinc can interfere with copper's biological activity
Treatment and prevention of megaloblastic (macrocytic) anemia
doi: 10.1093/carcin/18.7.1291
Nerve pain, or neuropathic pain, associated with vitamin B12 deficiency typically manifests as tingling, numbness, burning sensations, or sharp pains in the hands and feet

This is the critical difference from research peptide websites, which operate outside the pharmaceutical supply chain
