b12 injection stings Vitamin B12 Injection Sites: All You Need to Know Why Do I Feel Worse

Syringe: A syringe is used to draw up the B12 solution and administer the injection

Key Takeaways Ferritin is the best single marker of iron stores it drops long before hemoglobin and explains a lot of unexplained fatigue, hair loss, and exercise intolerance

[21] The loss of parietal cells in the gut seen with autoimmune gastritis, causes reduced gastric acid secretion, which leads to impaired nutrient absorption, and iron deficiency is commonly found in those with autoimmune gastritis

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However, it is an invasive, often painful procedure with significant cost and downtime