What three vitamins are closely associated with calcium and phosphorus?

The three vitamins closely associated with calcium and phosphorus are vitamin D, vitamin K, and vitamin A. Vitamin D enhances calcium absorption in the intestines and regulates calcium and phosphorus levels in the bloodstream. Vitamin K plays a crucial role in bone metabolism and helps in the regulation of calcium within the bones and arteries. Vitamin A is important for bone health as it influences the activity of osteoblasts and osteoclasts, which are essential for bone remodeling.