Vitamin D ist gar kein Vitamin? Und in den Wintermonaten können wir in unseren Breitengraden so viel "Sonne tanken" wie wir wollen, ohne dass genügend Vitamin D gebildet wird? UV-B-Strahlung

Vitamin D is not a vitamin. Its molecular structure and its mechanism of action are the ones of a hormone.

It is slowly becoming obvious to the healthcare community that vitamin D deficiency is an epidemic. The whole 5 minutes they talked about it to us in medical school was not sufficient to make us aware