title: Low-level luminescence of the human skin.
abstract: OBJECTIVE
  For the first time systematic measurements of the low-level luminescence of the human skin ("bi-ophotons") have been performed by means of a photon detector device set up in darkness.
  
  
  RESULTS
  Several months of daily investigations have shown that body light emission follows definite and well-known biological rhythms, such as 14 days, 1 month, 3 months, 9 months, and reflects the left-right symmetry of the body. The results confirm that biophotons are related to physiological functions.
  
  
  CONCLUSIONS
  This technique provides a new and powerful noninvasive diagnostic method. In particular, skin research and development may use it for testing the influence of different skin treatments.
authors.affiliation: International Institute of Biophysics, Biophoton Research, Neuss, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Cohen
authors.affiliation: International Institute of Biophysics, Biophoton Research, Neuss, Germany.
authors.forename: F A
authors.initials: FA
authors.lastname: Popp
keywords: biophotons; low-level luminescence; non-invasive skin diagnosis