Alzheimer’s Disease - vitamin b12 - 28725
Vitamin B12 normal ranges should be 600 to 2000 pg/ml. Below 550 to 600 pg/ml deficiencies start to appear in the CSF. Humans are born with serum levels of about 2000 pg/ml, which decline gradually throughout life.
Medical Hypotheses
1991
34
131-140
28725
1998
Summary
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PubMed