More specifically, you need vitamin D so your body can use calcium and phosphorus to build bones and support healthy tissues. With chronic and/or severe vitamin D deficiency, a decline in calcium and …

Mar 21, 2025 · Vitamin D is a nutrient the body needs, along with calcium, to build bones and keep them healthy. The body can absorb calcium only if it has enough vitamin D. Calcium is a major part of …

Learn more about Vitamin D uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Vitamin D.

Several forms (vitamers) of vitamin D exist, with the two major forms being vitamin D 2 or ergocalciferol, and vitamin D 3 or cholecalciferol. [1] The common-use term "vitamin D" refers to both D 2 and D 3, …

Feb 17, 2021 · Learn how to spot vitamin D deficiency symptoms, what foods are high in vitamin D, how much to take daily, and whether D2 or D3 is best for you.

Dec 18, 2025 · Vitamin D is involved in many bodily functions and plays a vital role in immune health and maintaining healthy bones and teeth. Vitamin D is produced when you expose your skin to …

May 20, 2013 · Your body produces vitamin D naturally when it’s directly exposed to sunlight. You can also get vitamin D from certain foods and supplements to ensure adequate levels of the vitamin in …

Vitamin D helps maintain strong bones. Learn how much you need, good sources, deficiency symptoms, and health effects here.

Jan 13, 2026 · Benefits of vitamin D extend beyond bones. A Mass General Brigham researcher shares benefits for immune health, reduced inflammation, and advanced cancer risk.

6 days ago · The sun isn't the only source of vitamin D. Foods like eggs and fortified milks can provide the nutrient, supporting bone density and immune function.