If you get a B12 injection and it stings, that means it's not just B12
Biochem J 369(3):477484 Ma Be, Chen D, Liu Y, Zhao Z, Wang J, Zhou G, Xu K, Zhu T, Wang Q, Ma C (2021) Yanghe decoction suppresses the experimental autoimmune thyroiditis in rats by improving NLRP3 inflammasome and immune dysregulation
Some require daily injections, while others are weekly
Proc Natl Acad Sci U S A (1999) 96(24):139626.10.1073/pnas.96.24.13962 30 SchneiderEPollardHLepaultFGuy-GrandDMinkowskiMDyM
By doing so, you may enjoy the many benefits of vitamin D, from stronger bones and a more robust immune response to improved overall well-being, all while keeping digestive comfort in mind