b12 injection rx Amazon Pharmacy: Vitamin (Injectable Solution) and nerve damage. Vitamin B12 Injection – Prescription

Always consult a healthcare professional to teach you the proper safety and delivery methods for injecting vitamin B12 and B-Complex

Your provider can personalize a schedule after reviewing symptoms, labs when indicated, and how you respond

[2] [6] In healthy adults, vitamin B 12 deficiency is not common, mainly because body stores of the vitamin are substantial and turnover is slow, with relatively low dietary requirements

but I would take that to mean that once you are on an adequate amount of B12 injections and no longer have large red blood cells , both folate and ferritin should remain at a good level with a healthy diet

Full effects build as your body stores more B12 and uses it efficiently