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Irritation tracks concentration
Nutrients 16(6): 815 (2024)

A randomised controlled trial is considered the gold standard of clinical evidence

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4 Aside from those with genetic methylation defects in the metabolism of vitamin B12 and folic acid, our patients have excellent results with a sublingual vitamin B12 that dissolves slowly under the tongue

Pflugers Arch 464(6):601611 Jenkinson SE, Chung GW, van Loon E, Bakar NS, Dalzell AM, Brown CDA (2012b) The limitations of renal epithelial cell line HK-2 as a model of drug transporter expression and function in the proximal tubule