Blue light: Friend or foe ?

Background: The purpose of this study was to elucidate why some potentially damaging and beneficial effects were obtained following blue light exposures on skin.

Materials And Methods: Light-emitting diode (LED) devices containing 415 and 470 nm bulbs were used on normal human keratinocytes, skin biopsies and subjects with acne. Reactive oxygen species (ROS) evaluation was performed after a course of blue LED light exposures.

Evaluation of light-emitting diodes (LED) effect on skin biology (in vitro study).

Background: Interest in anti-aging approaches has grown significantly in recent years. The most popular are the non invasive methods to decrease the signs of aging. One such method is LED-based therapy.