['vitamin d deficiency']
['cholecalciferol', 'placebo']

        Inclusion Criteria:

          -  participated in The 7th survey in The Tromsø study

          -  vitamin D deficiency

        Exclusion Criteria:

          -  primary hyperparathyroidism

          -  granulomatous disease

          -  reduced kidney function

          -  systolic blood pressure > 174 mmHg

          -  diastolic blood pressure > 104 mmHg

          -  diabetes

          -  renal stones last 5 years

          -  use of solarium on regular basis

          -  planned holidays in tropical areas

          -  clinical depression

          -  clinical signs of vitamin D deficiency (muscle weakness)

          -  use of vitamin D supplements

          -  serious illness
      