b12 injection vs oral supplement

After the first puncture of the rubber stopper, a vial of bacteriostatic water should be used within 28 days, per USP convention for benzyl-alcohol-preserved diluents Digestion and Probiotics https://smallfarmtoday.com/wp-content/uploads/2025/05/Healthletic-BPC-157-.jpg Size:10 mL (1000 mcg / mL) Been unwell for a year, b12 injections again even though levels are 840? : r/B12_Deficiency

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