I asked AI, “Can I get vitamin D through a closed window?
Reply:
No, it is not possible to get vitamin D through a window?”
To get vitamin D from sunlight, it is recommended to spend 10-15 minutes outdoors each day, between the hours of 10am and 4pm, with exposed skin. It is important to use sunscreen to protect the skin from harmful UV rays.
Vitamin D is produced in the skin when it is exposed to ultraviolet B (UVB) rays from the sun. However, glass blocks most UVB rays, so sitting in front of a window will not provide sufficient UVB exposure to produce vitamin D.