Light therapy may have the most science to back it:
– High-intensity light is shown to improve skin,
mood and sleep disorders, and its impact on
treating seasonal affective disorder is well known.
– LED light therapy for aging and damaged skin is
one of the hottest skincare treatments, and more
spas like Acqualina by ESPA in Miami (U.S.) and
Mandarin Orientals around the world use red and
blue LED technologies to repair/renew skin cells.