Folate and vitamin B12 in relation to lactation: a 9-month postpartum follow-up study.

Abstract:

OBJECTIVE:To investigate the relation between lactation and markers of folate and vitamin B12 (B12) deficiency in women with and without vitamin supplementation. DESIGN:A 9-month follow-up study. SUBJECTS AND METHODS:Blood samples from 91 women, who gave birth to a single healthy child, were collected 3 weeks, 4 and 9 months postpartum and analysed for circulating level of homocysteine (tHcy), methylmalonic acid (MMA), folate and B12. The participants were categorized as exclusively, partly or not breast-feeding dependent on the degree of lactation 4 months postpartum. During follow-up, lifestyle factors were recorded by structured interviews. RESULTS:Among 72 exclusively breast-feeding women, the median (10-90% percentile) tHcy was 5.8 (3.1-8.3) micromol/l 3 weeks postpartum, 6.1 (4.1-10.3) micromol/l 4 months postpartum and 5.3 (3.6-8.7) micromol/I 9 months postpartum. At 9 months postpartum, none of the women breast-fed exclusively. No significant change occurred in the concentration of B12 and folate. Exclusively breast-feeding women without vitamin supplementation had higher median tHcy than supplemented exclusively breast-feeding women 4 and 9 months postpartum (7.0 vs 5.4 micromol/l (P < 0.001) and 5.8 vs 4.5 micromol/l (P = 0.003), respectively). Six women had increased (>15 micromol/l) tHcy; four of these were unsupplemented and exclusively breast-feeding. CONCLUSION:We found no overall indication of depletion of the folate and B12 stores during the lactation period in this population. However, folate-supplemented women had lower tHcy and higher folate levels, suggesting a beneficial effect of supplementation with folate throughout lactation.

journal_name

Eur J Clin Nutr

authors

Ramlau-Hansen CH,Møller UK,Henriksen TB,Nexø E,Møller J

doi

10.1038/sj.ejcn.1602275

subject

Has Abstract

pub_date

2006-01-01 00:00:00

pages

120-8

issue

1

eissn

0954-3007

issn

1476-5640

pii

1602275

journal_volume

60

pub_type

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