do b12 injections work instantly How Quickly Does a Injection Work? Timeline and Expectations – Bolt Pharmacy How Long Does It Take

If I understand rightly you haven't an absorption problem.So once on supplements or a richer B12 diet you can store and utilise b12 from your liver

The frequency of B-12 injections depends on the severity of the deficiency and individual health needs

By inhibiting NNMT, 5-Amino-1MQ preserves SAM availability and reduces SAH accumulation, potentially supporting proper methylation of DNA, histones, and proteins - epigenetic modifications that regulate gene expression and cellular function

Side effects from shots can also mean you need a different dose

It passed by week four completely

7 Researchers from the 2020 study also noted that the increase in vitamin B12 was likely unrelated to typical dietary intake or standard supplementation because food and supplements generally do not substantially affect plasma B12 concentrations