what is the best time to take b12 injections Shots: How Quickly Do They Work? Injecting B12 - Enhance Me

This is a commonly referenced study from 1963 claiming a half-life of 5-6 days: nature.com/articles/198200a0 Although I would not cite it as an authority, the six-day half-life has also made it onto the B12 page in Wikipedia, seemingly unchallenged

Rehydrate and replenish your essential nutrients for a potentially faster relief

For example, if you injected medication into your left thigh this morning, use your right thigh this afternoon, your left abdomen tomorrow morning, and your right abdomen tomorrow afternoon

Getting injections too frequently can complicate symptom tracking and follow-up decisions

Injections are recommended every 2 weeks to maintain your B12 level

Afterwards, I may switch to another homekit without the weight loss focus