title: Problems in the assessment of vitamin deficiency.
mesh_terms: D000368:Aged; D001206:Ascorbic Acid Deficiency / Q000175:diagnosis / Q000209:etiology; D001361:Avitaminosis / Q000175:diagnosis* / Q000209:etiology; D001681:Biological Assay; D003296:Cooking; D013293:Enterococcus faecalis / Q000378:metabolism; D005260:Female; D005492:Folic Acid / Q000032:analysis; D005494:Folic Acid Deficiency / Q000209:etiology; D005511:Food Handling; D005525:Food-Processing Industry; D006801:Humans; D007778:Lactobacillus / Q000378:metabolism; D008297:Male; D011247:Pregnancy; D013472:Sunlight; D014808:Vitamin D Deficiency / Q000175:diagnosis / Q000209:etiology
chemical_list: D005492:Folic Acid