where do they inject b12 injections Best Vitamin Injection Sites B12 Shots vs. IV Infusions:

600 mcg (pregnant and lactating women) | Very sensitive to heat, acid pH and light, and sensitive to humidity | Required for the production of red blood cells in bone marrow* Biotin | 30 mcg

For further scientific insights, refer to

Purification, characterization and molecular cloning of human hepatic lysosomal acid lipase

Age: As people age, their ability to absorb vitamin B12 from food may decrease, leading to a higher risk of deficiency, especially in older adults

Sep 8 2020 Galms et al., Nutrients, doi:10.3390/nu12092738 Current State of Evidence: Influence of Nutritional and Nutrigenetic Factors on Immunity in the COVID-19 Pandemic Framework Ecological study of European countries analyzing 10 vitamins and minerals endorsed by the European Food Safety Authority as having sufficient evidence for a causal relationship between intake and optimal immune system function: vitamins D

If youve tried soothing techniques and are still experiencing significant pain or persistent discomfort, its time to consult a professional