Info about laser therapyWe take advantage of the properties of the different
types of light in an interplay, which gives therapists
some new treatment options.
What is laser? UK2024-04-08T07:22:20+02:00

Info about laser therapy

We take advantage of the properties of the different types of light in an interplay, which gives therapists some new treatment options.

The therapeutic and healing effects of laser therapy were first discovered in Budapest, Hungary in 1967, by Professor Endre Mester, while conducting experiments on lab rats.

The purpose of the experiments was to research the effects of laser on rats with skin cancer. He shaved the rats, made a small incision, and applied cancer to half of the rats.

The results were different than expected. The cancer cells were not affected, however, Professor Mester noticed that the wounds from the incisions healed significantly faster on those rats that had received laser treatment, compared to those in the control group.

This observation initiated the research of Low Level Laser Therapy (LLLT), also called cold laser or PhotoBioModulation.

How does laser therapy work?

Laser therapy is based on the following principle from the world of physics: Energy cannot be created or destroyed. Instead, energy can transform and can be transferred from one object to another.

With laser treatment, the energy from the laser light is transferred to the cells in the body where it can be used as fuel. With its unique characteristics and energy, the laser light penetrates deep into the tissue, into each individual cell and every little mitochondrion, where the energy is absorbed and thereby transferred.

This way, the cell gets the energy to perform the tasks that it is already programmed to do, including the body’s natural healing process.

If, for instance, you apply laser energy following an injury, the result is an acceleration of the body’s natural healing process. An example of this, a sprain, is illustrated in the diagram “Accelerated Natural Healing”.

The mitochondrion’s function

Most of the cells in our body contain one or more small units called the mitochondria. The mitochondria’s function is to produce fuel for the cell, ATP, with the help of the glucose in our bloodstream. ATP stands for Adenosine Triphosphate that the cell uses when it performs its tasks.

Every injury to the body, acute or chronic, leads to an energy deficit, which is characterized by a reduced production of ATP. This situation has been re-created in the lab where living cells were put under “nutritional stress”, i.e. they did not receive nutrition during a certain period of time. This leads to an imbalance in the Na+/K+ (Sodium/Potassium) pump and the electric membrane potential, as well as a reduction in the mitochondrial production of ATP.

By adding laser light – and nothing else – it has been demonstrated that all parameters have normalized, including an increase in the production of ATP to 100%.

Laserterapi giver energi til cellen

The principle of Accelerated Natural Healing™

Laser therapy is based on the principle of Accelerated Natural Healing, which is reflected in the following features and benefits:

  • Biostimulating laser therapy accelerates all phases of the body’s natural healing process.
  • Laser therapy provides energy to the cells by increasing the production of ATP, which leads to a significant increase in cell activity.
  • This leads to, among other things, a quicker coagulation after acute injuries, which reduces edema.
  • Laser therapy has a strong diminishing effect on inflammation, both in chronic and acute instances.
  • Laser therapy increases the production of collagen tissue and thereby contributes to quicker wound healing.
  • Laser therapy mobilizes the body’s natural immune system and increases its ability to fight bacteria, viruses and fungus.
  • The blood flow is increased, even in areas with reduced circulation and/or chronic muscle tensions.
  • Laser therapy has a pain relieving effect, partly by reducing the problem that caused the pain in the first place, and partly by stimulating the body’s production of endorphins and encephalin.
  • Biostimulating laser therapy has no known side effects. It simply helps the body do what it is already programmed to do – only much faster.

All these factors, which have been documented in thousands of scientific studies over the past 35 years, lead to what we call: Accelerated Natural Healing™

*) When talking about biostimulating laser therapy, several words describe the same thing: soft laser, cold laser, low intensity laser. The internationally recognized name for it is Low Level Laser Therapy, LLLT.

What is laser?

The word “LASER” is short for Light Amplification by Stimulated Emission of Radiation. In their book “The New Laser Therapy Handbook”, Tuner and Hode mention the interesting fact that the original thought was to use the word “Oscillation” instead of “Amplification”. However, this, unfortunately, would have resulted in the word “LOSER”.

Laser is, then, amplified light. The laser beam can be within or just outside the spectrum visible to the human eye, but only at one wavelength at a time. The European standard IEC 601 describes laser this way: “Any device which can be made to produce electromagnetic radiation in the wavelength range from 180 nm to 1 mm primarily by the process of controlled stimulated emission”.

Laser light is monochromatic, which means that it is emitted at only one wavelength, as opposed to sun light, for instance, that spans several wavelengths/colors – this is easily seen when a rainbow appears while rain and sunshine are present at the same time.

Laser is also coherent, which means that the wavelengths are emitted in phase, in other words, they occur at the same time and put out more power. A way to illustrate this is by looking at the difference between the power of ripples in water and the power of large, synchronized waves.

This makes them suitable for penetrating underlying tissue with a greater effect than sunlight or the light from a flashlight, which are non-coherent light sources.

Hvad er laser?

Lysets synlige farvespektrum

Når hvidt lys (f.eks. sollys) passerer gennem et prisme eller brydes i vanddråber i atmosfæren, bliver det opdelt i disse forskellige farver, hvilket skaber det smukke farvespektrum, vi ser i en regnbue.

Det synlige spektrum er det område af lysets elektromagnetiske stråling, som vores øjne kan opfatte og ser som farver. Det strækker sig normalt fra cirka 400 nanometer (nm) til 700 nm i bølgelængde.

Her er de generelle bølgelængdeområder for de forskellige farver i det synlige spektrum.

Lysets usynlige farvespektrum

Det usynlige spektrum refererer så til det område af elektromagnetisk stråling, hvor bølgelængderne ligger uden for det synlige spektrum for det menneskelige øje.

Ultraviolet (UV) stråling: Ultraviolet stråling har kortere bølgelængder end det synlige lys og omfatter bølgelængder under 400 nanometer (nm). Denne form for stråling er kendt for sine solskaderende egenskaber og bruges også i medicinske applikationer som f.eks desinfektion og UV-belysning.

Infrarød (IR) stråling: Infrarød stråling har længere bølgelængder end det synlige lys og omfatter bølgelængder over 700 nanometer (nm).
Infrarød stråling er alment kendt for sin varmeeffekt og bruges i en række teknologiske applikationer såsom en fjernbetjening.


While there is a wide range of indications for the use of laser therapy, there are also a few contraindications to be aware of.

However, each contraindication should, completely in line with each specific treatment, be assessed professionally in relation to the patient, so as to avoid unintended side effects.

There is currently no documentation indicating that laser therapy would be harmful to a pregnant woman or her baby.

However, just to be safe – and to prevent any liability issues in the unfortunate case that complications should arise in the pregnancy – we do not recommend treating your patient with laser therapy if she is pregnant.

Most countries have strict regulations as to which practitioners and specialists are authorized to treat cancer. Therefore, you should not use laser therapy on a patient who has cancer, or is suspected to have cancer.

Research is being done, though, with laser therapy and cancer, and in time we will see whether laser therapy could be a supplement in the pain management for terminal cancer patients.

In some countries, laser therapy is being used to treat some of the side effects of cancer treatment. In France, for instance, laser therapy is approved for the treatment of mucositis.

Not contraindicated

  • Pacemaker
  • Implants, screws, plates
  • Epiphyseal plates in children

Note: Pacemakers are only contraindicated if the laser energy is combined with electric or magnetic impulses. Besides warmth, lasers from PowerMedic only deliver laser (= light energy). Light is not known to harm objects enclosed in metal.

Areas of caution 

Birth marks and tattoos are not necessarily contraindicated, however, you should be careful. The dark colors are likely to absorb the laser energy, which can create some uncomfortable heating. We recommend treating next to a birth mark or tattoo (instead of directly on top of it), or holding the laser with some distance to the skin to start with, and then adjust the intensity based on feedback from your patient.

Want to know more?

If you want to know more about laser therapy, you can click on the various topics below and read more.

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