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subcutaneous vs intramuscular b12 injections for Energy: Benefits and How It Works Oral vs. Intramuscular Vitamin B12
Description
Scand J Haematol 1982;29:311-318 Pezacka E, Green R, Jacobsen DW

Nausea Some individuals experience mild nausea after injections, especially during the initial phase

Additionally, these check-ups offer an opportunity to assess any emergent neurological symptoms and address them promptly

doi: 10.1073/pnas.0802917105
This makes it safer and more adaptable