No…The sun, Vitamin D, infrared lights, & other forms that mimic the sun, do not cause cancer…What they do is bring things that are deep in organs up to the surface…It is a myth that the sun causes cancer…It is just causing stuff to come to the surface…Tanning beds act like the sun…They can be very useful as do it yourself radiotherapy, especially with ulcerative fungating tumours…It helps dry them up…A visit to a tanning salon cleaned up a pneumonia I had that had become chronic…It can speed up the metabolism, boost mood…Very useful in colder climates( we are in Canada)…Another tool in the do it yourselfers arsenal- radiation…