Objective      To investigate the nutritional status of Vitamin D (VitD) among the normal population in Chongqing.       Methods      Three thousand eight hundred and seventy-five health people with age from 3 to 71 years

who were collected from Chongqing Kingmed Diagnostics from January to August 2012 were enrolled in this study. They were divided into 3 groups according to their age

that is

≤14-year-old group (n=657)

15- to 44-year-year-old group (n=3 019)

and ≥45-year-old group (n=199). Their serum level of 25 (OH) VitD was detected by API4000Lc-MS/MS. Software SPSS 13.0 was used for statistical analysis.       Results      In ≤14-year-old group

the ratios of those with VitD severe deficiency

deficiency

insufficient

normal

and excess were 1.52%

19.03%

9.44%

70.02% and 0%

respectively. In the 15- to 44-year-old group

the ratios of 4 later statuses were 60.09%

27.59%

12.32% and 0%

respectively

while the ratios were 84.92%

13.07%

2.01% and 0% respectively for the ≥45-year-old group. In the 2 later groups

the females had lower level of VitD than the males

and had higher ratio of VitD deficiency at the same time (P0.01)

but no such difference was found in the ≤14-year-old group. The average serum level of VitD was decreased along with the increase of age in the ≥45-year-old group compared with the 15- to 44-year-year-old group (P0.01).       Conclusion       The different degree of VitD deficiency exists in the population of Chongqing area (including children). Women have a higher proportion with VitD deficiency. There is roughly equal ratio of VitD deficiency between girls and boys among the children

but the deficiency is serious.