what happens if you miss a b12 injection Vitamin Injections: Good or Bad? B12 Injection Delays: Navigating UK
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[DOI] [PubMed] [Google Scholar] 127.Kominiarek M.A

Fasted morning injection is common but monitor for blood sugar dips if you are sensitive

[3] Another review of 14 randomized controlled trials also did not consistent evidence of benefit with the use of vitamin B12 supplements, alone or with other B vitamin supplements, on cognitive function in people with either normal or impaired cognition

If still not dissolving, the peptide may have degraded before reconstitution
