97 European Food Safety Authority (EFSA) (2015) Scientific opinion on dietary reference values for cobalamin (vitamin B12)
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Vitamin B12 serves as an essential nutrient that supports red blood cell development, maintains healthy nerve tissue, and assists in DNA synthesis
18 As Thakkar and Billa, they point out potential concerns for smokers, but again this is based on an article from 1970
Effective for Deficiency Injections are often recommended for individuals with conditions that limit B12 absorption, such as: Pernicious anaemia Gastrointestinal disorder Post-bariatric surgery patients Signs You May Be Low in Vitamin B12 You might benefit from B12 testing or treatment if you experience: Persistent fatigue or weakness Tingling or numbness in hands and feet Difficulty concentrating (brain fog) Pale or jaundiced skin Shortness of breath Mood changes or irritability If left untreated, B12 deficiency can lead to more serious complications, so early treatment is important
Injection delivery is the only reliable way to maintain therapeutic levels for patients with absorption issues or rapid elimination