If you have checked your blood vitamin D level with e.g. the VHC Vitamin-D Test your consultant/therapist is able to adjust his recommendations for individual vitamin D supplementation without any risk, even if he/she recommends a higher daily supplementation than what is printed on the product or the package insert. In general, Even long term vitamin D supplementation of up to 10.000 I.U. vitamin D per day is regarded as save, because this is just about the amount of vitamin D your body might produce on its own provided, there is sufficient skin exposition to sunlight containing the appropriate UV wavelengths during the summer period in the northern hemisphere.
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