when are b12 injections given The Shot: What Every Human Needs to Know About Injectable Vitamin B12 Vitamin B12 Injection Side Effects

The study found that while overall BMD declined in both the treatment and placebo groups, those with lower baseline B12 status experienced a reduced rate of BMD decline with B-vitamin supplementation

Then, weekly for a few more weeks

Combined supplementation improves resistance to infections and supports faster recovery

Severity of Deficiency: Those with more severe deficiencies might need more shots or higher doses at first

doi: 10.3389/fphar.2025.1602976 Received 30 March 2025 Revised 13 November 2025 Accepted 14 November 2025 Published 19 December 2025 Volume 16 - 2025 Edited by Bernd Rosenkranz, Fundisa African Academy of Medicines Development, South Africa Reviewed by Kacper Nijakowski, Poznan University of Medical Sciences, Poland Miriam Njoki Karinja, Science for Africa Foundation, Kenya Updates Copyright 2025 Mazur, Ndokaj, Salerno, Vallone, Ardan, Bietolini, Carrouel, Wilk, Sarig, Ottolenghi and Bourgeois