Low-level luminescence of the human skin Author: S. Cohen, F. A. Popp Affiliation: International Institute of Biophysics, Biophoton Research, Neuss, Germany. Correspondence to Address: F. A. Popp International Institute of Biophysics Biophoton Research Station Hombroich Vockrather Straβe D – 41472 Neuss Germany Tel: 02182-825131 Fax: 02182-825132 Conference/Journal: Skin Research and Technology Date published: 1997 Other: Volume ID: 3 , Issue ID: 3 , Pages: 177-180 , Word Count: 99 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.