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Benefits of InfraRed and Near-InfraRed on Hair Growth


A small study in the Journal of Cosmetic and Laser Therapy explored the effect of low-level light on people with alopecia.

The study revealed that people who received RLT had improved hair density, compared with those in a control group.

The authors note that the effect was beneficial when people applied light in wavelengths of both 665 nanometres (nm) and 808 nm.

However, this was a smaller study, and more extensive clinical studies will help give backing to these claims.


RLT is a completely natural process. It exposes the skin to levels of light that are not harmful — unlike UV light coming from the sun.

Because of this, there is virtually no risk of side effects from undergoing RLT. However, a practitioner with little experience or someone who exposes themselves to too much of the treatment may cause tissue and cell damage.

Products for use at home may also lead to misuse, causing damage to the skin, burns, or damage to unprotected eyes.

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