Vitamin A and your bones
Mae West once said, "Too much of a good thing is ...wonderful." Whatever else she had in mind, it certainly wasn't vitamin A. Although doctors have long known that very large amounts of vitamin A are toxic, studies show that modest doses previously considered safe can increase your risk of fracture.
What is vitamin A?
Like all vitamins, vitamin A is an organic (carbon-containing) compound that is required to keep the body's metabolism running smoothly. Because the body cannot manufacture vitamins, all 13 must be consumed on a regular basis. Only tiny amounts are required to prevent vitamin-deficiency diseases, but slightly larger amounts of some, such as the B vitamin folic acid, may have additional benefits. But although vitamins are necessary and all-natural, excessive amounts can be harmful.