[How to make vitamin testing by GP's more efficient]

The orders of vitamin tests by general practitioners (GP) has risen dramatically, although the number of indications is constant and limited. This commentary reflects on a study that reduced vitamin B12 testing with 20% and vitamin D testing with 23%. The intervention consisted of feedback for the GPs of the numbers of orders and education including communication skills. A part of the patients received information. The intervention showed also sustainable effects. The study resulted in a national campaign: more than 1000 GP practice employees have been trained through an e-learning that is free available and accredited. More than 4000 leaflets have been disseminated. Also posters, a short movie and benchmark information are available.