name for b12 injection

https://polarispeptides.com/acd-cgi/img/v1/wp-content/uploads/2024/08/Block-1-1-scaled-e1724134686405-2048x785.jpg?metadata=none&width=1920 research use Size:100 mg Is 250 mcg the same as 0.25 mg Vitamin B12-Nexpir

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