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Typical reference ranges include: Normal vitamin B12 levels: 200900 pg/mL Low B12 levels: Below 200 pg/mL Borderline levels: 200300 pg/mL (may require further testing) These values may vary slightly between laboratories
How do B12 injections work
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Side effects of B12 deficiency can include decreased cognitive function, fatigue, lethargy, feeling faint, depression or irritability, headache, balance issues and more
If you follow a vegan diet, lack B12-rich food, or suffer from health conditions like B12 deficiency, which happens when a person cannot absorb it properly, then you may experience b12 deficiency
Vitamin B12 deficiency can damage the nervous system even in people who dont have anemia, so it is important to treat a deficiency as soon as possible
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