optimal health1 Sign of Vitamin D deficiency in our body Vitamin D deficiency can have serious consequences for a person's health. It can affect bone strength, muscle function, and the immune system. Index 1.What is Vitamin D Deficiency? 2.Causes of Vitamin D Deficiency 3.Symptoms of Vitamin D Deficiency 4.The Link Between Vitamin D Deficiency and Bone Health 5.The Link Between Vitamin D Deficiency and Muscle Function 6.The Link Between Vitamin D Defi.. 2023. 5. 6. 이전 1 다음