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Corresponding to residues 176-191 of the human growth hormone sequence, this 16-amino-acid C-terminal fragment is offered as a lyophilized white to off-white powder produced by solid-phase peptide synthesis and purified to not less than 98% by reversed-phase HPLC, with identity and purity documented on the lot-specific Certificate of Analysis available on request

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Precautions Prior to taking vitamin B12, tell the physician that you have: A cold or an allergy that affects your nasal cavity and the signs you develop A kidney disease A liver disease Any kind of infection An iron deficiency A folic acid deficiency An allergy to vitamin B12 or cobalt A lebers disease as cyanocobalamin can trigger optical nerve damage and blindness A pregnancy, a plan to get pregnant or a breastfeeding baby.