Additional risk factors include: Chronic kidney disease : Reduced renal clearance may impair B12 excretion Liver disease : Hepatic dysfunction can disrupt B12 metabolism and storage Myeloproliferative disorders : Certain blood cancers increase B12-binding proteins Concurrent medication use : Some drugs may interact with B12 metabolism, including metformin, proton pump inhibitors, and H2 antagonists Patients with these conditions should have B12 supplementation carefully monitored by their healthcare team
References Pickart, L., Thayer, L., & Thaler, M
Background literature can be explored via PubMed
Skin, hair follicles, joints, and connective tissue throughout the body all benefit from circulating GHK-Cu, which somewhat undercuts the case for a localized injection in the first place
Patients should verify that their vials arrive cold and should transfer them to refrigeration without delay
However, other studies have indicated that zinc supplementation could be associated with an increased risk of prostate cancer (373)