Vitamin B12 biomarker patterns and kidney function in US adults: National Health and Nutrition Examination Survey 2011-2012.
INTRODUCTION Total serum vitamin B12 levels may not align with biomarkers of circulating active vitamin B12 or intracellular vitamin B12-dependent metabolism. We estimated the population prevalence of marker-defined discordance among US adults and examined the influence of kidney function. METHODS We analyzed Nationa...