Yes, sun exposure can indeed help us get more vitamin D. UVB rays in sunlight promote the synthesis of vitamin D in the skin, which is crucial for osteoporosis patients. To get enough vitamin D, osteoporosis patients can sunbathe for 15-30 minutes daily, especially between 10 AM and 3 PM when sunlight is strongest. However, it's important to avoid excessive sun exposure to prevent skin damage. Additionally, while sunbathing, one should also protect the skin by applying appropriate sunscreen.