The aim of this study is to evaluate the efficacy of daily intake of fortified sunflower oil with vitamin D on serum 25-hydroxyvitamin D level, glycemic and lipidemic status in healthy subjects compared to plain oil.

Sixty apparently healthy subjects will be selected. Participants who are receiving vitamin D, calcium or omega-3 supplements within the last three months will be excluded. Subjects will be assigned randomly to one of the two intervention groups: 1.fortified sunflower oil, 2. plain bread+vitamin D supplements,3. plain bread+placebo. Each participant will consume 50 g of oil every day for 2 months.

At the first and last visits, dietary and laboratory assessments will be performed for all subjects. Primary outcomes are the improvement in vitamin D status and secondary outcome is the improvement of glycemic and lipidemic markers and prevention of problems related to hypovitaminosis D.

Inclusion Criteria:

• 20 to 60 years
• healthy subjects
• no receiving vitamin D or omega-3 supplement in past 3 months

Exclusion Criteria:

- receiving vitamin D or omega-3 supplement during the study