The vitamin predominantly obtained from sunlight is Vitamin D. When the skin is exposed to ultraviolet B (UVB) rays from sunlight, it synthesizes Vitamin D. This vitamin is crucial for maintaining bone health, as it helps the body absorb calcium and phosphorus. Additionally, Vitamin D plays a vital role in immune function and has been linked to mood regulation. Due to modern lifestyles that often limit sun exposure, many individuals may need to supplement their diet with Vitamin D or consume foods fortified with it to maintain optimal levels for overall health.