Vitamin D supplements are now considered an integral part of any dietary supplement regimen. The “Sunshine Vitamin” is a fat-soluble vitamin that is essential for bone growth and mineralization, as well as for the absorption of calcium. But in recent years, vitamin D has become a popular seasonal wellness supplement, as studies have shown its strong potential for promoting a healthy immune response. Typically, vitamin D supplements deliver anywhere from 400-10,000 IU of D3 (cholecalciferol), the form your skin produces if exposed to natural sunlight. Even though your body naturally produces vitamin D, modern lifestyles tend to keep you indoors, blocking this normal production cycle. Help protect your bones and your immune system by adding a vitamin D supplement to your regimen.