Effect of Vitamin-enriched Egg Intake on Serum 25-Hydroxy-vitamin D Levels in Healthy Young Women

Abstract

We conducted a crossover trial to investigate the effect of vitamin-enriched egg consumption on serum 25-hydroxy-vitamin D (HVD) levels in healthy young women (aged 21±0 years) . Forty-one female subjects were divided into two groups. One group was given two vitamin-enriched eggs in addition to their usual diet every day for 4 weeks followed by a washout period, and then normal eggs were provided for 4 weeks. The other group received with same diets, but in reverse order. Before the investigation, the mean serum HVD levels in 53.7％ of the subjects were less than 50 nmol/L, indicating vitamin D deficiency. At the end of the period of vitamin-enriched egg consumption, the HVD level increased and reached more than 50 nmol/L in 92.7％ of the subjects, indicating adequate intake of vitamin D. During both the normal egg consumption and washout periods, the serum HVD level was less than 50 nmol/L in 34.1％ of the subjects, and no significant difference was detected between the periods before and after normal egg consumption. Throughout the investigation periods, food intake did not change. These findings suggest that vitamin-enriched egg consumption could improve serum HVD levels in healthy young women.