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A U.S. federal food consumption survey determined that for women and men over 19, average iron consumption from foods and beverages was 13.1 and 18.0 mg/day, respectively. For women, 16% in the age range 14–50 years consumed less than the Estimated Average Requirement (EAR), and for men ages 19 and up, fewer than 3%. [18]
Red blood cells have an average volume of 80–100 femtoliters, but individual cell volumes vary even in healthy blood. [1] Certain disorders, however, cause a significantly increased variation in cell size. Higher RDW values indicate greater variation in size. Normal reference range of RDW-CV in human red blood cells is 11.5–15.4%.
For men the EAR is 6.0 mg/day for ages 19 and up. The RDA is 15.0 mg/day for women ages 15–18, 18.0 for 19–50, and 8.0 thereafter; for men, 8.0 mg/day for ages 19 and up. (Recommended Dietary Allowances are higher than Estimated Average Requirements so as to cover people with higher than average requirements.) The RDA for pregnancy is 27 mg ...
Levels greater than 9% are associated with poor control of the glycated hemoglobin, and levels greater than 12% are associated with very poor control. Diabetics who keep their glycated hemoglobin levels close to 7% have a much better chance of avoiding the complications that may accompany diabetes (than those whose levels are 8% or higher). [88]
A1c is a weighted average of blood glucose levels during the life of the red blood cells (117 days for men and 106 days in women [18]). Therefore, glucose levels on days nearer to the test contribute substantially more to the level of A1c than the levels in days further from the test.
The RDA is 15.0 mg/day for women ages 15–18, 18.0 mg/day for ages 19–50 and 8.0 mg/day thereafter. For men, 8.0 mg/day for ages 19 and up. RDAs are higher than EARs so as to identify amounts that will cover people with higher-than-average requirements. RDA for pregnancy is 27 mg/day and, for lactation, 9 mg/day. [10] For ...
Anemia – A target hemoglobin level of 100–120 g/L is recommended; [70] [71] raising hemoglobin levels to the normal range has not been found to be of benefit. [72] Guidelines recommend treatment with parenteral iron prior to treatment with erythropoietin. Replacement of erythropoietin is often necessary in people with advanced disease. [73]
A healthy level of hemoglobin for men is between 13.2 and 16.6 grams per deciliter, and in women between 11.6 and 15 g/d. [37] Normal adult hemoglobin is composed of four protein chains, two α and two β-globin chains arranged into a heterotetramer.