The most common wavelengths you will see are 630 nm (orange-red) and 660 nm (deep red) which roughly coincide with the absorption peaks of cytochrome c oxidase (the target of light therapy), plus they are cheaply available and efficient. Wavelength absorption – Taken from Karu et al., 2005 The practice involves exposure to bright sources of red light, typically in the 610-700nm wavelengths. Red light therapy uses any wavelength between 610 nm and 700 nm.
#Red light therapy skin#
Stronger devices such as 100mW/cm²+ LED light devices can reach through the entire skin layer, healing from the bottom up. Most red light devices on the market are weak and will only penetrate 2 – 3mm of skin tissue. Sunlight however, comes bundled with potentially harmful UV (and potentially beneficial) & blue light, making red light therapy different in various respects. This same mechanism is also responsible for many of the benefits of sunlight, which contains the red wavelengths as part of its spectrum. The key difference between red and infrared is that red wavelengths of light are absorbed and used in the first 25mm of skin tissue, whereas infrared light can penetrate much deeper into the body.
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Red light interacts with the body in a similar way to infrared light – This it thought to involve a few mechanisms including by increasing energy (ATP) generation on the cellular level. The beauty of this type of treatment is that there are no significant side effects doucmented, yet a long and well studied list of applications. Most of the studies and interest is around the use to treat skin conditions, but there are a whole host of further applications. Red light therapy involves exposure to fairly strong sources of visible red light (610-700nm).Īs a natural, non-invasive method there are a wide variety of applications being studied.