Should I Be Worried about Radiation from Laser Hair Removal?

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Should I be Worried about Radiation from Laser Hair Removal-

Given that Laser is an acronym for Light Amplification by Stimulated Emission of Radiation, the question "should I be worried about radiation from laser hair removal?" seems like a very reasonable one.

This article aims to explain, in understandable terms, the different types of radiation and whether you should, indeed be concerned about it in respect of laser hair removal.

Radiation and Laser Hair Removal?

What is Radiation?Electromagnetic Radiation​Ionizing Electromagnetic RadiationNon-ionizing Electromagnetic Radiation​How Lasers Work​A Brief Explanation

ConclusionCautionary AdviceMore Information​ Sources

What is Radiation?

Radiation is defined as the transmission of energy, in waves or particles, through space or a material medium.

There are different types of radiation, namely electromagnetic, particle, neutron and acoustic.

​The type of radiation with which we are concerned is electromagnetic. The illustration below shows the full electromagnetic spectrum and where visible light falls within it.

Electromagnetic Radiation

There are two types of electromagnetic radiation; ionizing and non-ionizing.

​Ionizing Electromagnetic Radiation

Ionizing electromagnetic radiation is at the high energy, high frequency end of the spectrum i.e. some ultraviolet rays (sunlight), x-rays and gamma rays

The energy produced is sufficient to break molecules into smaller, charged particles called ions, thus damaging substances or materials including living cells.

Ions can also contribute to chemical reactions which spread the damage causing living cells to die or become cancerous.

It is therefore ionizing electromagnetic radiation which represents a high risk to health, and is associated with burns, radiation sickness, genetic damage, and cancer.

Non-ionizing Electromagnetic Radiation​

Non-ionizing electromagnetic radiationvibrate atoms

Radio waves, microwaves, infrared lamps as well as laser hair removal devices all utilize non-ionizing electromagnetic radiation: There is insufficient energy to cause the damage to DNA associated with the development of cancer.

All forms of radiation​ deliver energy which heats the material absorbing it - the amount of heat depends upon the intensity and length of time exposed.

How Lasers Work

​A Brief Explanation

Lasers used in hair removal devices use visible and invisible (infrared) light to target the dark pigment, melanin, found in hair and skin.

​Melanin is found in concentration at the base of the hair follicle.

The hair follicle is damaged, causing the hair to fall out by a process known as selective photothermalysis i.e. light energy is absorbed by the melanin to produce heat.

The process disables the follicle by matching a specific wavelength of light and pulse duration, determined by the skin and hair type of the individual being treated. The ultimate goal is to try to cause sufficient damage to prevent regrowth.

Hair removal lasers operate between 700 - 1400 nanometers (nms) depending on which type of laser is being used. (A nanometer being the unit of measurement for the wavelengths of light and infrared radiation).

​As you can see from the illustration, the wavelengths used are not in the high intensity, ionizing range.

More Information​

For more detailed information about the safety of laser hair removal, possible side effects and how to find a reputable practitioner, see our articles below:

  • Is laser hair removal safe
  • Side effects of laser hair removal

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