Osifo B O, Onifade A
Trop Geogr Med. 1976 Mar;28(1):37-40.
Serum vitamin B12 concentrations were determined immediately after delivery among fifty healthy mothers and in cord blood of their newly delivered babies. The serum vitamin B12 concentrations of the infants were higher than those of their mothers and the ratio was approximately 2:1. The maternal serum vitamin B12 concentration was significantly higher than other maternal serum vitamin B12 concentration reported previously and the infant serum vitamin B12 level was also significantly higher than other infants studied in similar projects. These results suggest that the high serum vitamin B12 concentration reported among Nigerians is most probably due to both genetical and environmental factors coupled with some microbial synthesis in the gastro-intestinal tract after resuming a full adult diet.
在50名健康母亲分娩后立即测定其血清维生素B12浓度，并同时测定其新生儿脐带血中的维生素B12浓度。婴儿的血清维生素B12浓度高于其母亲，比例约为2:1。母亲血清维生素B12浓度显著高于先前报道的其他母亲血清维生素B12浓度，婴儿血清维生素B12水平也显著高于类似项目中研究的其他婴儿。这些结果表明，尼日利亚人血清维生素B12浓度较高很可能是由于遗传和环境因素，再加上恢复成人全膳食后胃肠道中的一些微生物合成。
