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Preparations containing preservatives should not be introduced into the cerebrospinal fluid due to the risk of neurotoxic effects on neural tissue
For peptides that do not dissolve cleanly in bacteriostatic water alone typically those with hydrophobic sequences or basic amino acid-rich compositions that require protonation for solubilisation the recommended approach is to first perform initial reconstitution in a small volume of 0.1% acetic acid water (also available from Peptides Lab UK) to produce a clear stock solution, before diluting further with bacteriostatic water or the relevant physiological buffer
Letting the water run gently down the glass wall preserves the molecular integrity that makes the peptide effective
Vitamin B12: Fact sheet for health professionals
Therapeutic Class: Active Ingredients: Vitamin B12 Vitamin B12 Injection is used to treat and prevent vitamin B12 deficiency in patients with pernicious anemia and other conditions that cause a deficiency of this vitamin
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