For a long time it was believed that vitamin D only used to fight against rickets and had to only utility that allow the absorption of calcium. In this book, the author reveals that vitamin D is essential for the immune system and the prevention of certain cancers. It would even be more than a vitamin, it would act like a hormone. Vitamin D is beginning to reveal as arguably the essential vitamin. If you value your health and that of your children you should inform yourself by reading this book because most doctors do not tell you. You will learn why this vitamin is essential especially in winter to protect yourself from flu and other infections and you will know how to tell if you have enough vitamin D in the blood and if not how to fix it. A must-read for any age!
