Periconceptional folic acid intake and disturbing factors: A single‐center study in Japan

Kamura, Shunsuke; Sasaki, Akira; Ogawa, Kohei; Kato, Kiyoko; Sago, Haruhiko

doi:10.1111/cga.12449

Cited by 1 publication

(1 citation statement)

References 12 publications

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“…In addition, dietary folate intake (240 μg/day) is recommended in the second/third trimester of pregnancy as additional intake [ 6 ]. However, in a Japanese study from 2017, only 45.1% of pregnant women used folic acid supplements [ 7 ]. Moreover, on average, dietary folate intake is 243 μg/day in Japanese pregnant women [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Maternal dietary folate intake with folic acid supplements and wheeze and eczema in children aged 2 years in the Japan Environment and Children’s Study

Masuda

Kobayashi²,

Miyashita³

et al. 2022

PLoS ONE

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Maternal intake of folic acid supplements is reportedly associated with the risk of early-onset allergies in offspring. However, only a few studies have considered the intake of both folic acid supplements and dietary folate. Here, the relationship between maternal intake of folic acid supplements and allergic symptoms such as wheeze and eczema in offspring was analyzed while considering dietary folate intake. We examined 84,361 mothers and 85,114 children in the Japan Environment and Children’s Study. The participants were divided into three groups depending on maternal folic acid supplementation (“no use,” “occasional use,” and “daily use”). Each group was then subdivided into three groups based on total folic acid and dietary folate intake. Outcomes were determined considering the wheeze and eczema status of each child at the age of 2 years. The status was based on the International Study of Asthma and Allergies in Childhood. It was found that 22.1% of the mothers took folic acid supplements daily. In contrast, 56.3% of the mothers did not take these supplements. Maternal intake of folic acid supplements was not associated with wheeze and eczema in the offspring. In contrast, only dietary folate intake was positively associated with wheeze at the age of 2 (adjusted odds ratio, 1.103; 95% confidence interval, 1.003–1.212). However, there is no scientific evidence of a biological mechanism that clarifies this result. Potential confounders such as other nutrition, outdoor/indoor air pollution, and genetic factors may have affected the results. Therefore, further studies on the association between maternal intake of folic acid and allergic symptoms at the age of 3 or above are needed to confirm the results of this study. Trial registration UMIN Clinical Trials Registry (number: UMIN000030786)

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Section: Introductionmentioning

confidence: 99%