Folate depletion in old age.
D000328:Adult; D000367:Age Factors; D000368:Aged; D000748:Anemia, Macrocytic / Q000209:etiology; D005260:Female; D005494:Folic Acid Deficiency / Q000150:complications / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D008297:Male; D011247:Pregnancy; D012737:Sex Factors; D013222:State Medicine; D006113:United Kingdom