If you see undissolved particles after 30 minutes, try very gentle rolling of the vial between your palms
The key takeaway is that under normal usedrawing from an aluminum-covered vial into a transparent syringe and injecting within a minute or sothere is nothing to worry about
Medicinal Ingredient: Sterile Water for Injection, USP
But before answering that important question, you need to answer these questions with your provider first
The fix: inject a small amount of air (0.3-0.5 mL) into the vial first before drawing water into the syringe
National Library of Medicine: Indeed, DNA synthesis is impaired by low vitamin B12, which hampers the activation of folate and, as a result, decreases normal red blood cell production, impairing oxygen delivery [62] WebMD indicates, if you have vitamin B12 deficiency, you could become anemic