Vitamin D plays a very important role in your body, especially in helping the absorption of calcium, which is crucial for maintaining healthy bones. If your vitamin D level is insufficient, it can lead to osteoporosis, meaning your bones become weak and prone to fractures. You can maintain sufficient vitamin D levels by getting sunlight exposure, eating foods rich in vitamin D (like fish, egg yolks, and fortified milk), and taking vitamin D supplements. Regularly checking your vitamin D levels is also important, especially for older adults and those who don’t get much sunlight.