b12 injections for athletes Vitamin Injection: Energy Boost and Anemia Treatment — Mountainside Medical Vitamin B12 Injection
Description
Sci 112, 28762881 (2015)

You should be able to tell what it is, how to use it, and how to verify quality testing before buying
The other suggests an evidence gap that requires pharmacokinetic research before conclusions can be drawn

However, if it's almost time for your next scheduled dose, simply skip the missed dose and continue with your regular schedule
