Vitamin d Deficiency

What is vitamin D deficiency? Vitamin D deficiency means you don’t have enough vitamin D in your body. It primarily causes issues with your bones and muscles. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Vitamin D is an essential vitamin that your body uses for normal bone development and maintenance. Vitamin D also plays a role in your nervous system, musculoskeletal system and immune system. Sun exposure on your skin (however, people with darker skin and older people may not get enough vitamin D through sunlight. Through the food you eat. Despite all these methods to get vitamin D, vitamin D deficiency is a common worldwide problem. Why is vitamin D so important? Vitamin D is one of many vitamins your body needs to stay healthy. It plays a crucial role in maintaining the balance of calcium in your blood and bones and in building and maintaining bones. More specifically, you need vitamin D so your body can use calcium and phosphorus to build bones and support healthy tissues.