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Hi Star13, I was prescribed B12 injections the ampules suddenly disappeared off my prescription list, just as some other things keep doing . There is your answer

Specifications Molecular Formula: C14H22N4O9 Molecular Weight: 390.35 g/mol Purity: 99% (HPLC Verified) Format: Lyophilized Peptide Powder Storage: Store at 20C for long-term stability

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Also, learn if drinking more water or using eye drops containing castor oil, N-acetylcarnosine or aloe can help with dry eye

Lyophilized peptides may remain stable at room temperature for several weeks when intended for near-term use