does injectable vitamin b12 go bad injections expire is expired safe Are Shots Safe? Royal Palm Beach Medical Group Safe to use if expired? – Safe to use if expired? – Vitamin B12 Supplements and Injections

B12 Shots & B12 Injections: The Good, Bad, and Alternative

Both methods can be effective when appropriately used

Mice undergoing in vivo reprogramming were found to become depleted in B 12 and show signs of methionine starvation while supplementing reprogramming mice and cells with B 12 increased reprogramming efficiency, indicating a cell-intrinsic effect

Retrieved 11 February 2026

Examples of these health conditions include those with a lack of stomach acid, those who have undergone bariatric surgery, anemia caused by the inability to absorb the vitamin, other autoimmune digestive diseases, as well as several medications