title: Study Exploring the Effects of Daily Supplementation with 400 μg of Folic Acid on the Nutritional Status of Folate in Women of Reproductive Age.
abstract: BACKGROUND
  This investigation determines the nutritional state of serum and red blood cell (RBC) folate concentration and their relation with intake of folate, B6,and B12, with serum vitamin B12, and with genetic variants after provision of 400 μg/day of folic acid for 3 months to a group of 34 Colombian women of reproductive age.
  
  
  METHODS
  We evaluated nutrient intake using 24-hr recall, assessing the levels of serum folate, RBC folate, serum B12, and homocysteine, as well as determining genetic variants of the enzyme MTHFR (C677T and A1298C) and CβS (844ins68pb).
  
  
  RESULTS
  The results show that following intake of 400 μg/day of folic acid, the risk of folate deficiency as seen in regular dietary intake disappears and the nutritional status of this nutrient is increased (p < 0.001). With respect to vitamin B12,the risk of serum deficiency with folic acid consumption increased slightly, and those that were found to be B12deficient after supplementation also had decreased levels of serum homocysteine. Genetic factors did not influence the nutritional status of folate, although an association was found between the intake of nutrients and biochemical indicators.
  
  
  CONCLUSIONS
  Given the results of our study, subsequent studies evaluating folic acid supplementation should also consider evaluating the status of B12and B6, and serum and RBC folate, as they participate interdependently in the cycle of folate and methionine and in homocysteine metabolism.Birth Defects Research 109:564-573, 2017.© 2017 Wiley Periodicals, Inc.
authors.affiliation: Research Group in Food and Human Nutrition, School of Nutrition and Dietetics, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Laidy D
authors.initials: LD
authors.lastname: Arias
authors.affiliation: Research Group in Food and Human Nutrition, School of Nutrition and Dietetics, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Beatriz E
authors.initials: BE
authors.lastname: Parra
authors.affiliation: Research Group in Food and Human Nutrition, School of Nutrition and Dietetics, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Angélica M
authors.initials: AM
authors.lastname: Muñoz
authors.affiliation: Research Group in Food and Human Nutrition, School of Nutrition and Dietetics, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Diana L
authors.initials: DL
authors.lastname: Cárdenas
authors.affiliation: Independent Global Nutrition Consultant, Medellín, Colombia.
authors.forename: Tiffany G
authors.initials: TG
authors.lastname: Duque
authors.affiliation: Research Group in Food and Human Nutrition, School of Nutrition and Dietetics, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Luz M
authors.initials: LM
authors.lastname: Manjarrés
mesh_terms: D000328:Adult; D000367:Age Factors; D019587:Dietary Supplements; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage* / Q000097:blood*; D005494:Folic Acid Deficiency / Q000097:blood; D006801:Humans; D009752:Nutritional Status / Q000187:drug effects*; D012098:Reproduction / Q000502:physiology; D014806:Vitamin B 12 Deficiency / Q000097:blood* / Q000178:diet therapy*; D055815:Young Adult
chemical_list: D005492:Folic Acid
keywords: folate; folate deficiency; folate intake; folic acid; nutritional status; red blood cell folate; serum folate