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Randomised trial to investigate possible differences in biological availability and effectiveness between vitamin K solution in oil and vitamin K tablets.

1. Determining whether or not the vitamin K tablets have the same biological availability in humans as the vitamin K solution has.2. Determining whether or not the vitamin K tablets are as effective as the vitamin K solution is.

A randomised, double blind placebo controlled trial to (A) assess the optimal vitamin K dosage for supplementation, and (B) to access wether complications of anticoagulation treatment will diminish by suppletion of vitamin K.

VIKS-2A:To determine the optimal dosage of vitamin K for supplementation to obtain a stable anticoagulation effect.VIKS-2B:To determine whether supplementation with the found optimal dosage of vitamin K from study VIKS-2A will decrease the number of…