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Red light therapy (RLT) is a treatment that may help skin, muscle tissue, and other parts of your body heal. It exposes you to low levels of red or near-infrared light. Infrared light is a type of energy your eyes can’t see, but your body can feel as heat. Red light is similar to infrared, but you can see it.

Red light therapy is also called low-level laser therapy (LLLT), low-power laser therapy (LPLT), and photobiomodulation (PBM)

Red light therapy also referred to as low-level laser therapy (LLLT) or photobiomodulation—is the act of using red light (or near-infrared light) for beneficial properties on the body.

These beneficial properties are outlined in detail below, but red light (in the proper intensity and dose) has a therapeutic or healing effect on the tissue and body.

Red light therapy may involve using a laser that emits light in the red light spectrum onto an injured body part or using a red light LED shone on the body, as practical examples.

Research has shown that light in the red and near-infrared spectrum has a lot of benefits on the body. This light typically ranges from 620 nanometers (nm) in length to around 1000nm in length.

These specific wavelengths penetrate very deep into the bodily tissues and are also absorbed very well by the body.

How Does Red Light Therapy Work?

With red light therapy, you expose your skin to a lamp, device, or laser with a red light. A part of your cells called mitochondria, sometimes called the “power generators” of your cells, soak it up and make more energy. Some experts think this helps cells repair themselves and become healthier. This spurs healing in skin and muscle tissue.

Red light therapy uses very low levels of heat and doesn’t hurt or burn the skin. It’s not the same type of light used in tanning booths, and it doesn’t expose your skin to damaging UV rays.

As you can see, red light has a greater penetration depth compared to other forms of light, such as UV, blue, green or the longer infrared wavelengths meaning that the red light can reach deeper bodily tissues.