Out of date vials of B12 how stron Pernicious Anaemi B12 Shots Tampa FL, Urgent Care South Tampa Immediate Care B12 Injections at Home Safety Guide for Self Administration Infusion For Health Polymap Vitamin B Complex With Vitamin B12 Injection, 2 ml at 333 box in Nagpur AkfaLife B12 Vial 10 ml X 10 Oral Vial Akfa Life Vitamin B12 Vials Boost Energy & Neurological Health Pharmaroya Pharmaceutical Cosmetics Industry and Trade, OTC (Over the Counter), Food Supplements, Dermocosmetics, Hi I bought the B12 injectable liquid but there's no use by date on it or how long you have to use it once it's opened. Anyone know the answer? TIA x