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Updated: Jun 17, 2026

Modifying Levels of Maternal Dietary Folic Acid or Choline to Study the Impact of Deficiencies on Offspring Health Outcomes
Published on: June 28, 2024
Maternal folate and cobalamin status predicts vitamin status in newborns and 6-month-old infants
Gry Hay1, Torun Clausen, Andrew Whitelaw
1Institute of Basic Medical Sciences, Department of Nutrition, University of Oslo, 0316 Oslo, Norway. gry.hay@medisin.uio
Insights
Maternal folate and cobalamin status significantly predict infant vitamin levels long-term. Maternal holotranscobalamin (holoTC) and holohaptocorrin (holoHC) are key indicators for infant cobalamin status.
Area of Science:
- Nutritional biochemistry
- Maternal and child health
- Longitudinal cohort studies
Background:
- Infant folate and cobalamin status are crucial for development.
- Predictors of these vitamin statuses in infancy require elucidation.
- Maternal vitamin status and lifestyle factors may influence infant nutrient levels.
Purpose of the Study:
- To identify predictors of folate and cobalamin status in infants.
- To examine the persistence of these predictors throughout the first six months of life.
- To evaluate the utility of various biomarkers for assessing vitamin status.
Main Methods:
- Longitudinal study of 364 mother-infant pairs with blood samples collected during pregnancy, at birth, and at 6 months.
- Analysis of serum/plasma folate, cobalamin, holotranscobalamin (holoTC), holohaptocorrin (holoHC), methylmalonic acid (MMA), and total homocysteine (tHcy).
- Multivariate regression models to relate vitamin status to maternal factors, parity, lifestyle, and anthropometry.
Main Results:
- Maternal folate and cord folate strongly predicted infant folate levels.
- Maternal holoTC was the best predictor of newborn cobalamin status.
- Maternal and cord holoHC predicted 6-month cobalamin status; effects of parity, sex, and smoking diminished over time.
Conclusions:
- Maternal folate and cobalamin status positively impact infant vitamin status long-term.
- Maternal holoTC is a superior predictor of newborn cobalamin status.
- HoloHC shows promise as a marker for predicting cobalamin status later in infancy.
Abstract:
Our aim in this longitudinal study was to determine predictors of folate and cobalamin status in infancy. Data were collected from 364 mother-infant pairs with blood measurements from pregnancy ( approximately 18 wk; n = 149), newborns (cord serum; n = 361), and 6-mo-old partially or exclusively breast-fed children (n = 221). Serum/plasma folate, cobalamin, holotranscobalamin (holoTC), holohaptocorrin (holoHC), methylmalonic acid (MMA) and total homocysteine (tHcy) at birth and 6 mo were related to maternal vitamin status, parity, lifestyle variables, and anthropometry. In multivariate analyses, the strongest predictors of folate at birth and 6 mo were maternal folate and cord folate, respectively (P < 0.01). Maternal holoTC best predicted cobalamin status at birth (positively associated with cord cobalamin, holoTC, and holoHC; inversely with MMA and tHcy; P < or = 0.001), whereas maternal and cord holoHC were the strongest predictors of cobalamin status at 6 mo (positively associated with cobalamin, holoTC, holoHC; inversely with tHcy; P < 0.05). The association between cobalamin status and parity was negative at birth but positive at 6 mo. Birth weight, female sex, and smoking were associated with low cobalamin or high tHcy at birth but showed no or opposite associations at 6 mo. In conclusion, maternal folate and cobalamin status exerts a long-term positive effect on infant vitamin status. The effect of smoking, parity and female sex on cobalamin status did not persist beyond the newborn period. Maternal holoTC was the superior predictor of newborn cobalamin status, while holoHC could be a valuable marker for predicting cobalamin status later in infancy.
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