Modification Reference values
Test code: 254
PREVIOUS
Reference values
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CURRENT
Reference values
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200 - 950 pg/mL
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Low: Less than 120 pg/mL
Undetermined: 120 - 160 pg/mL
Normal: 160-970 pg/mL
High: Greater than 970 pg/mL
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Studies show neuropsychological symptoms occur anywhere below 500-550 pg/mL. Neurological symptoms can become permanent if not treated within months. Your reference values prevent physicians from diagnosing B12 Deficiency in symptomatic patients.
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