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People on certain medications: Some medications can interfere with the absorption or metabolism of vitamin B12, including proton pump inhibitors (PPI), metformin, nitrous oxide anesthesia, some epileptic medications, and colchicine (for gout)

Many research peptides are supplied in a lyophilized or freeze-dried format to support stability during storage and transportation

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The peptide used was 99% high pressure liquid chromatography (HPLC) purity with 1-des-Gly peptide as biologically inactive impurity (4-16,30-33)