it all depends on your situation
Geriatric The metabolism rate in older patients (75-79 years) is reduced
IM vitamin B12 treatment have well-documented the efficacy (defined as the normalization and or a significant increase of the serum vitamin B12 level) and safety of oral vitamin B12 as a curative treatment [20,21,24]
No typical human dose has been established
They're also helpful for those with PCOS, thyroid problems, autoimmune conditions, or limited sun exposure
However, sometimes due to other health conditions or food preferences, this isnt always possible, but if you can, you should consume foods that provide this valuable vitamin