Elsborg L, Rosenquist A
Int J Vitam Nutr Res. 1979;49(1):70-6.
In a dietary analysis comprising 110 girls aged 13-15 years and 87 pregnant women the mean folate intake proved to be less than one-third of the Recommended Dietary Allowances. Among the girls there was a significantly positive correlation between folate intake and energy intake, while this did not apply to the pregnant women. The reason was that the excess energy intake during pregnancy was only modest, and in many cases it was met by energy calories of low nutritional value. If supplements of folic acid are needed during pregnancy, it is recommended to start prophylaxis as early as possible, as folate intakes by potential mothers (teenage girls) are insufficient to secure a high depot level for folates before pregnancy.
在一项针对110名13至15岁女孩和87名孕妇的饮食分析中，叶酸平均摄入量被证明低于推荐膳食摄入量的三分之一。在这些女孩中，叶酸摄入量与能量摄入量之间存在显著的正相关，而孕妇的情况并非如此。原因是孕期能量摄入过多的情况并不严重，而且在很多情况下，多余能量是由低营养价值的热量提供的。如果孕期需要补充叶酸，建议尽早开始预防，因为潜在母亲（少女）的叶酸摄入量不足以在怀孕前确保体内有较高的叶酸储备水平。
