As a chiropractor in San Diego, I see more than just cases of back pain. Patients ask all kinds of health questions. For many years, we have known two things in regards to the sun to be true. First, the sun is bad for you. Therefore, exposure should be limited. Most people don’t know this, but the sun has three types of sun rays, not just two. The first is ultraviolet C light. This is also known as UVC. This ray usually does not reach our planet’s surface and this is good because it is believed only brief exposure to UVC rays is fatal to our body. Next is ultraviolet B radiation. This is also known as UVB rays. These have long been considered the tanning rays of the sun. They are strongest during the summer months when the Earth’s orbit is closest to the Sun. UVB rays are what produce a sun tan to our skin.