| Outcome Measures: |
Primary: development of diabetes type 2, 5 years | Secondary: change in glucose metabolism, 5 years|change in lipid status, 5 years|change in mood, 5 years|change in BMD hip, 5 years|change in intima media thickness carotid artery, 5 years|change in frequency of infections, 5 years|change in blood pressure, 5 years|Change in Insulin sensitivity, 5 years|change in HbA1c, 5 years|change in weight, 5 years|change in telomer length, 5 years | Other: Oral glucose tolerance response to vitamin D supplementation in relation to polymorphisms in the vitamin D system, The response to oral glucose tolerance test (fasting and 2 h blood glucose, serum insulin, C-peptide, measures of insulin resistiance as well as metabolic parameters (lipids, blood pressure)) will be evaluated in the results at the 1-year visit in relation to genetic polymorphisms in the vitamin D system, 1 year
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