What is Red Light Therapy or Infrared Light Therapy?

What is Red Light Therapy?

Red light therapy,also known as Low Level Laser Therapy and Photobiomodulation,is a therapeutic technique that uses red and near infrared wavelengths of light to treat skin issues,such as wrinkles, scars, and persistent wounds, as well as other conditions such as joint,tendon and muscle pain and several others.

In the early 1990s,red light was used by scientists to help grow plants in space. The scientists found that the intense light from red light-emitting diodes (LEDs) helped promote growth and photosynthesis of plant cells.

Red light was then studied for its potential application in medicine,more specifically to find out if red light could increase energy inside human cells.The researchers found that it was indeed an effective way to treat the muscle atrophy, slow wound healing, and bone density issues caused by weightlessness during space travel. 

Red light therapy uses light sources such as LEDs and lasers to emit either red or infrared light or a combination of these for health improvement.Generally,that treatment is minimally heating.So you're not going to sweat profusely from red light therapy as you will from an infrared sauna,even though your tissues might warm up slightly.

The red and infrared light doesn't just hit your skin though.Instead,the light penetrates into your body (7; 8; 9; 10; 11; 12; 13). For different tissues there's a different penetration depth,though. Bone and fat are tissues that are hard to penetrate,for instance. And,skin thickness can influence how far the light ventures into your body.

Having said that, different types of red and infrared light penetrate at least a few centimeters into your body. And once int he body, that light has a biological effect.

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