data from 10,515 persons examined in the second national health and nutrition examination survey ( nhanes ii ) were used to compare mean dietary intakes of several nutrients and food groups , hemoglobin , mean corpuscular volume , transferrin saturation , erythrocyte protoporphyrin , and serum ferritin between regular supplement users and nonusers aged 16 to 74 years .
C0019046
hemoglobin
C0014792
erythrocyte