Indeed, B12 and folate interact in the metabolism of methyl group in the transform from 5-MTHF to homocysteine, and this reaction is mediated by B12 dependent methltransferase, which results in the formation of methionine
Typical daily range: 2.55 mg once or twice daily (subcutaneous)
Injections are a good fit when you want a focused shot, while IV therapy is better when hydration is part of the goal
Renal function: mild eGFR changes observed in some patients
Proponents of B12 shots claim they turbocharge the metabolism (read: make you thinner), strengthen the immune system, and help cure fatigue, insomnia, even depression
You might explore options that combine B12 with other beneficial elements