Effect of Folic Acid Fortification on Plasma Folate and Total Homocysteine Concentrations

Background In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 μg per 100 g) began in 1996, and the process was essentially complete by mid-1997....

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Veröffentlicht in:The New England journal of medicine Jg. 340; H. 19; S. 1449 - 1454
Hauptverfasser: Jacques, P.F, Selhub, J, Bostom, A.G, Wilson, P.W.F, Rosenberg, I.H
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Boston, MA Massachusetts Medical Society 13.05.1999
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ISSN:0028-4793, 1533-4406
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Abstract Background In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 μg per 100 g) began in 1996, and the process was essentially complete by mid-1997. Methods To assess the effect of folic acid fortification on folate status, we measured plasma folate and total homocysteine concentrations (a sensitive marker of folate status) using blood samples from the fifth examination (January 1991 to December 1994) of the Framingham Offspring Study cohort for base-line values and the sixth examination (January 1995 to August 1998) for follow-up values. We divided the cohort into two groups on the basis of the date of their follow-up examination: the study group consisted of 350 subjects who were seen after fortification (September 1997 to March 1998), and the control group consisted of 756 subjects who were seen before fortification (January 1995 to September 1996). Results Among the subjects in the study group who did not use vitamin supplements, the mean folate concentrations increased from 4.6 to 10.0 ng per milliliter (11 to 23 nmol per liter) (P<0.001) from the base-line visit to the follow-up visit, and the prevalence of low folate concentrations (<3 ng per milliliter [7 nmol per liter]) decreased from 22.0 to 1.7 percent (P< 0.001). The mean total homocysteine concentration decreased from 10.1 to 9.4 μmol per liter during this period (P<0.001), and the prevalence of high homocysteine concentrations (>13 μmol per liter) decreased from 18.7 to 9.8 percent (P<0.001). In the control group, there were no statistically significant changes in concentrations of folate or homocysteine. Conclusions The fortification of enriched grain products with folic acid was associated with a substantial improvement in folate status in a population of middle-aged and older adults.
AbstractList Background In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 μg per 100 g) began in 1996, and the process was essentially complete by mid-1997. Methods To assess the effect of folic acid fortification on folate status, we measured plasma folate and total homocysteine concentrations (a sensitive marker of folate status) using blood samples from the fifth examination (January 1991 to December 1994) of the Framingham Offspring Study cohort for base-line values and the sixth examination (January 1995 to August 1998) for follow-up values. We divided the cohort into two groups on the basis of the date of their follow-up examination: the study group consisted of 350 subjects who were seen after fortification (September 1997 to March 1998), and the control group consisted of 756 subjects who were seen before fortification (January 1995 to September 1996). Results Among the subjects in the study group who did not use vitamin supplements, the mean folate concentrations increased from 4.6 to 10.0 ng per milliliter (11 to 23 nmol per liter) (P<0.001) from the base-line visit to the follow-up visit, and the prevalence of low folate concentrations (<3 ng per milliliter [7 nmol per liter]) decreased from 22.0 to 1.7 percent (P< 0.001). The mean total homocysteine concentration decreased from 10.1 to 9.4 μmol per liter during this period (P<0.001), and the prevalence of high homocysteine concentrations (>13 μmol per liter) decreased from 18.7 to 9.8 percent (P<0.001). In the control group, there were no statistically significant changes in concentrations of folate or homocysteine. Conclusions The fortification of enriched grain products with folic acid was associated with a substantial improvement in folate status in a population of middle-aged and older adults.
In 1996, the Food and Drug Administration (FDA) issued a regulation, to be effective by January 1998, requiring that all enriched flour, rice, pasta, cornmeal, and other grain products contain 140 μg of folic acid per 100 g in addition to the thiamine, riboflavin, niacin, and iron already present in such products. 1 The goal of this folic acid fortification was to increase the intake of folate by women of childbearing age in response to the recommendation of the Public Health Service that “all women of childbearing age in the United States who are capable of becoming pregnant should consume 0.4 . . .
In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 microg per 100 g) began in 1996, and the process was essentially complete by mid-1997. To assess the effect of folic acid fortification on folate status, we measured plasma folate and total homocysteine concentrations (a sensitive marker of folate status) using blood samples from the fifth examination (January 1991 to December 1994) of the Framingham Offspring Study cohort for baseline values and the sixth examination (January 1995 to August 1998) for follow-up values. We divided the cohort into two groups on the basis of the date of their follow-up examination: the study group consisted of 350 subjects who were seen after fortification (September 1997 to March 1998), and the control group consisted of 756 subjects who were seen before fortification (January 1995 to September 1996). Among the subjects in the study group who did not use vitamin supplements, the mean folate concentrations increased from 4.6 to 10.0 ng per milliliter (11 to 23 nmol per liter) (P<0.001) from the baseline visit to the follow-up visit, and the prevalence of low folate concentrations (<3 ng per milliliter [7 nmol per liter]) decreased from 22.0 to 1.7 percent (P< 0.001). The mean total homocysteine concentration decreased from 10.1 to 9.4 micromol per liter during this period (P<0.001), and the prevalence of high homocysteine concentrations (>13 micromol per liter) decreased from 18.7 to 9.8 percent (P<0.001). In the control group, there were no statistically significant changes in concentrations of folate or homocysteine. The fortification of enriched grain products with folic acid was associated with a substantial improvement in folate status in a population of middle-aged and older adults.
In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 microg per 100 g) began in 1996, and the process was essentially complete by mid-1997.BACKGROUNDIn 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of neural-tube defects in newborns. Fortification (140 microg per 100 g) began in 1996, and the process was essentially complete by mid-1997.To assess the effect of folic acid fortification on folate status, we measured plasma folate and total homocysteine concentrations (a sensitive marker of folate status) using blood samples from the fifth examination (January 1991 to December 1994) of the Framingham Offspring Study cohort for baseline values and the sixth examination (January 1995 to August 1998) for follow-up values. We divided the cohort into two groups on the basis of the date of their follow-up examination: the study group consisted of 350 subjects who were seen after fortification (September 1997 to March 1998), and the control group consisted of 756 subjects who were seen before fortification (January 1995 to September 1996).METHODSTo assess the effect of folic acid fortification on folate status, we measured plasma folate and total homocysteine concentrations (a sensitive marker of folate status) using blood samples from the fifth examination (January 1991 to December 1994) of the Framingham Offspring Study cohort for baseline values and the sixth examination (January 1995 to August 1998) for follow-up values. We divided the cohort into two groups on the basis of the date of their follow-up examination: the study group consisted of 350 subjects who were seen after fortification (September 1997 to March 1998), and the control group consisted of 756 subjects who were seen before fortification (January 1995 to September 1996).Among the subjects in the study group who did not use vitamin supplements, the mean folate concentrations increased from 4.6 to 10.0 ng per milliliter (11 to 23 nmol per liter) (P<0.001) from the baseline visit to the follow-up visit, and the prevalence of low folate concentrations (<3 ng per milliliter [7 nmol per liter]) decreased from 22.0 to 1.7 percent (P< 0.001). The mean total homocysteine concentration decreased from 10.1 to 9.4 micromol per liter during this period (P<0.001), and the prevalence of high homocysteine concentrations (>13 micromol per liter) decreased from 18.7 to 9.8 percent (P<0.001). In the control group, there were no statistically significant changes in concentrations of folate or homocysteine.RESULTSAmong the subjects in the study group who did not use vitamin supplements, the mean folate concentrations increased from 4.6 to 10.0 ng per milliliter (11 to 23 nmol per liter) (P<0.001) from the baseline visit to the follow-up visit, and the prevalence of low folate concentrations (<3 ng per milliliter [7 nmol per liter]) decreased from 22.0 to 1.7 percent (P< 0.001). The mean total homocysteine concentration decreased from 10.1 to 9.4 micromol per liter during this period (P<0.001), and the prevalence of high homocysteine concentrations (>13 micromol per liter) decreased from 18.7 to 9.8 percent (P<0.001). In the control group, there were no statistically significant changes in concentrations of folate or homocysteine.The fortification of enriched grain products with folic acid was associated with a substantial improvement in folate status in a population of middle-aged and older adults.CONCLUSIONSThe fortification of enriched grain products with folic acid was associated with a substantial improvement in folate status in a population of middle-aged and older adults.
Author Wilson, P.W.F
Bostom, A.G
Jacques, P.F
Selhub, J
Rosenberg, I.H
Author_xml – sequence: 1
  fullname: Jacques, P.F
– sequence: 2
  fullname: Selhub, J
– sequence: 3
  fullname: Bostom, A.G
– sequence: 4
  fullname: Wilson, P.W.F
– sequence: 5
  fullname: Rosenberg, I.H
BackLink http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1789949$$DView record in Pascal Francis
https://www.ncbi.nlm.nih.gov/pubmed/10320382$$D View this record in MEDLINE/PubMed
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Issue 19
Keywords Human
Plasma
Middle age
Hematology
Vitamin
Biological marker
Marker
Concentration
Epidemiology
Folic acid
Folate
Cohort study
Total
Biological effect
Effectiveness factor
Elderly
Language English
License CC BY 4.0
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http://dx.doi.org/10.1056/NEJM199905133401901
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Snippet Background In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the...
In 1996, the Food and Drug Administration (FDA) issued a regulation, to be effective by January 1998, requiring that all enriched flour, rice, pasta, cornmeal,...
In 1996, the Food and Drug Administration issued a regulation requiring all enriched grain products to be fortified with folic acid to reduce the risk of...
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StartPage 1449
SubjectTerms Acids
Adult
Age
Aged
Aged, 80 and over
Biological and medical sciences
Birth defects
blood plasma
Case-Control Studies
Cohort Studies
Dietary Supplements
Federal regulation
Female
folic acid
Folic Acid - administration & dosage
Folic Acid - blood
Folic Acid Deficiency - drug therapy
food fortification
Food, Fortified
General and cellular metabolism. Vitamins
hematologic tests
homocysteine
Homocysteine - blood
human health
human nutrition
Humans
Male
Medical sciences
Middle age
Middle Aged
Older people
Pharmacology. Drug treatments
Vitamin B
Vitamin B Complex - administration & dosage
Womens health
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Title Effect of Folic Acid Fortification on Plasma Folate and Total Homocysteine Concentrations
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