Sakai D, Mochida J, Yamamoto Y, Nomura T, Okuma M, Nishimura K, Nakai T, Ando K, Hotta T: Transplantation of mesenchymal stem cells embedded in Atelocollagen gel to the intervertebral disc: a potential therapeutic model for disc degeneration
Easy to administer with clear instructions
Why Combining These Therapies Works Better Individually, each therapy is effective
Highlights of Prescribing Information: Zepbound (tirzepatide) Injection, for subcutaneous use
Further, NICE and the BNF says that if there are neurological symptoms present, then every other day injections are the recommended treatment, so all the points you make about B12 being stored and sufficient are not really relevant