Vitamin B5 reduces bone loss when due to elevated phosphorus. For the same reason, it can be helpful for patients with some gouty-types of arthritis. Although Vitamin A has been found to be somewhat protective for some types of cancer, a higher intake encourages osteoporosis, and it inhibits Vitamin D and its protective effect on several types of cancer - although a normal intake of Vitamin A is required for Vitamin D to function properly... Full Text