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NHS laboratories generally define deficiency as a serum B12 below approximately 148 pmol/L (equivalent to roughly 200 ng/L or pg/mL), though reference ranges vary between laboratories and results should always be interpreted in the context of local ranges and the patient's clinical presentation
2010;16(3):BR81-88
Amount Per Capsule
Myelin protects nerve fibers
My cat Cleo (who I had to put down after a lengthy illness with advanced renal disease) felt much better after I gave her a B12 shot and even though I knew it wasn't curing her it made me feel better to know that I was at least making her feel better
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