CIDESCO Certification Practice Exam

The vitamin that is produced by sunlight and plays a crucial role in bone formation is vitamin D. When the skin is exposed to ultraviolet (UV) rays from the sun, it synthesizes vitamin D3, which is then converted into its active form within the body. This active form of vitamin D is vital for proper calcium absorption and metabolism, which are essential for maintaining healthy bones and preventing conditions such as rickets in children and osteoporosis in adults.

While vitamin K is indeed important for bone health due to its role in calcium binding, it is not synthesized from sunlight. Instead, it is primarily obtained from dietary sources, particularly green leafy vegetables. Thus, the significance of sunlight in the production of vitamin D distinctly highlights its unique function in bone formation compared to other vitamins.