Introduction:
Results of the epidemiologic studies conducted over recent years indicate vitamin D deficiency, especially among children and young people. The following factors affecting occurrence of vitamin D deficiencygrowth should be mentioned: improper lifestyle, using UV filters and inadequate vitamin D intake. The aim of the research was an attempt to evaluate action carried out as part of preschoolers' vitamin d deficiency prophylaxis taken by their parents.

Material and Methods:
The research was conducted in 2014. The group contained 118 parents of children aged 4–6. The method of the diagnostic survey was utilized in the research with poll used as a technique and author's survey questionnaire provided as a tool. The obtained results of the research underwent statistical analysis. In order to define the existence of the differences or correlations between analyzed immeasurable parameters, chi–square test was used.

Results:
Most of the interviewed parents supply their children with fish; 14.4% (n=17) do this 2–3 a week; 8.5% (n=10) would never serve their children fish. Whole milk, cheese and eggs were most frequently chosen among products containing vitamin D. Children of 93.2% (n=110) of the interviewed parents spend at least two hours a day outdoors from April to September. However, less than 89.8% (n=106) of the parents state that that children’s skin is protected with UV sunscreen at the time. 14.4% (n=17) of the interviewed parents provide their kids with vitamin D on a daily basis, all year around. Cod liver oil is the most common preparation chosen by parents who declared vitamin D supplementation.

Conclusions:
On-going education of parents concerning nutrition principles of children seems necessary as they are responsible for cultivating good eating habits among the young.