Iron and vitamin C.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D000747:Anemia, Hypochromic / Q000209:etiology; D000818:Animals; D001205:Ascorbic Acid / Q000097:blood / Q000378:metabolism*; D002940:Circadian Rhythm; D005260:Female; D006168:Guinea Pigs; D006454:Hemoglobins / Q000096:biosynthesis; D006801:Humans; D007501:Iron / Q000097:blood / Q000378:metabolism*; D007962:Leukocytes / Q000032:analysis; D008297:Male; D008593:Menopause; D008875:Middle Aged; D012737:Sex Factors
D006454:Hemoglobins; D007501:Iron; D001205:Ascorbic Acid