b12 injections and headaches Why Do I Feel Worse After My Injection? Causes & Management – Bolt Pharmacy B12 Headache: The Link Between
Description
In this blog, we will understand the factors contributing to vitamin B12 deficiency, the benefits of this essential nutrient, and how quickly you might experience improvements after receiving B12 injections
Sources ClinicalTrials.gov

Pens dial in 0.1 mg increments and total mass per pen is shown on the product page

The dose is usually between 1-5 mg