Recommended is this informative article titled Are Humans Really Beings of Light? A great primer to the research of Dr. Fritz Albert Popp discussing the nature of biophotonic emissions, cellular health and DNA.
Upon digging around a bit further I stumbled on this video which sums up the contents of the article quite nicely based on research material presented in The Field by Lynne McTaggart – see previous posts for her audiobook and an interview.