Vitamin D3 supplements are critical to staying healthy. Most people are deficient in vitamin D. Vitamin D3, also known as the sunshine vitamin, is essential for maintaining strong bones and teeth, as well as supporting a healthy immune system. Our bodies naturally produce vitamin D when our skin is exposed to sunlight, but many people don’t get enough sun exposure, especially those living in areas with limited sunlight or who spend most of their time indoors. In addition, certain groups of people, such as older adults, people with darker skin, and those who are obese, are at a higher risk of vitamin D deficiency. Taking vitamin D3 supplements can help ensure that you are getting enough of this important nutrient to stay healthy. If you are unsure whether you are getting enough vitamin D through your diet and sun exposure, talk to your healthcare provider about whether supplements might be right for you.