For general wellness, a common schedule is getting an injection anywhere from once a week to once a month
Sublingual B12: Pros and Cons Sublingual B12 supplements dissolve under the tongue, where some of the vitamin may be absorbed through the tissues in the mouth before being swallowed
Moreover, it is very rare that any forms of vitamin B12 are found in plant-based foods, making a dietary supply of B12 difficult for vegans to obtain (see here: Vitamin B12 for Vegetarians and Vegans)
However, if you experience any serious side effects or worsening of any of the symptoms, please consult your doctor
What are Vitamin B12 injections
When you inject water, the body has to equalize the salinity, and that shift can cause the stinging pain from B12 injections based on water