09/23/2026
Let’s talk about why we, as veterinary professionals, use therapeutic lasers such as K-Laser in practice—and why calling them simply “red light therapy” can be misleading.
Photobiomodulation (PBM) encompasses a broad range of light-based therapies. While an at-home red-light device and a professional therapeutic laser may both use light to influence cellular activity, they are not necessarily delivering the same treatment.
As veterinary professionals, we use therapeutic lasers such as K-Laser because they allow us to deliver a controlled, measurable, and clinically appropriate dose of light energy to the tissues we are treating.
It’s not just about the color of the light
One of the biggest misconceptions is that all red or near-infrared light therapy is essentially the same.
It isn't.
When someone describes a professional therapeutic laser as simply a “red light laser,” that description leaves out some of the most important factors that determine how the treatment is delivered and used clinically.
We consider things such as:
Wavelength
Power output
Power density
Energy delivered (joules)
Treatment time
Treatment area
Pulsing or continuous-wave delivery
Tissue depth and type
The condition being treated
These parameters allow a veterinary professional to develop a treatment protocol rather than simply exposing an area to red light.
Why do we use therapeutic lasers in veterinary practice?
In practice, we may use therapeutic laser treatments as part of a broader treatment plan for conditions involving joints, muscles, tendons, ligaments, wounds, and postoperative recovery.
The advantage of a professional therapeutic laser is that we can adjust the treatment to the patient and the tissue we are trying to reach. A higher-powered therapeutic laser can deliver the desired amount of energy much more efficiently than many consumer devices.
That is particularly important when we're treating deeper structures, where simply shining a low-powered light on the surface may not provide the same dose to the target tissue.
“Red light” doesn't tell you how effective a device is
This is an important point for pet owners.
A device being marketed as red light therapy, infrared therapy, or even laser therapy doesn't, by itself, tell you how effective it will be for a particular medical condition.
Two devices could use a similar wavelength but deliver dramatically different amounts of energy because their power output, beam characteristics, treatment area, and treatment time are different.
So when evaluating a therapy, “What color is the light?” is only one piece of the puzzle.
The more meaningful question is:
What dose of what wavelength is being delivered to the tissue, and is that dose appropriate for the condition we're treating?
Why professional laser therapy is different
This is why veterinary professionals use systems such as K-Laser in practice. We aren't simply using a stronger version of a red-light panel. We are using a therapeutic device that allows us to select and control treatment parameters and deliver a specific energy dose to the patient.
That distinction matters.
An at-home red-light device may be useful for certain applications, but it shouldn't automatically be considered interchangeable with professional veterinary laser therapy simply because both are described as photobiomodulation or red light therapy.
PBM is the umbrella term. “Red light” describes part of the spectrum. A therapeutic laser is the delivery technology. The clinical effect depends on the combination of wavelength, dose, power, treatment parameters, and the tissue being treated.
And that is precisely why, as veterinary professionals, we use therapeutic lasers in practice rather than treating every light-based device as equivalent.
