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©2013 UpToDate ® Print Email Proposed lower limits of normal for hemoglobin concentration in white and black adults Group Hemoglobin, g/dL White men, y 20-59 13.7 60+ 13.2 White women, y 20-49 12.2 50+ 12.2 Black men, y 20-59 12.9 60+ 12.7 Black women, y 20-49 11.5 50+ 11.5 Based on Scripps-Kaiser data for the 5th percentiles for the populations in question. NHANES data are considered to be confirmatory. To convert hemoglobin from grams per deciliter to grams per liter, multiply grams per deciliter by 10. Reproduced from: Beutler, E, Waalen, J. The definition of anemia: what is the lower limit of normal of the blood hemoglobin concentration? Blood 2006; 107:1747. Copyright © 2006 The American Society of Hematology.