can breastfeeding moms have a vitamin b12 injection Understanding postpartum supplements for women – Binto Vitamin B12 Deficiency: Symptoms, Causes
Description
Side effects are generally mild (bruising, headache)
Decreased cADPR and increased NAD+ in the Cd38/ mouse

Neuroscience & Biobehavioral Reviews

Other risk factors for B12 deficiency are stress, excessive alcohol use, and smoking

The frequency of B12 injections varies based on the severity and cause of deficiency: For significant deficiencies or pernicious anemia, daily or weekly shots may be started, then tapered to monthly maintenance doses