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Optimal Treatment Times for Laser Therapy and Tissue Stimulation

Low-Level Laser Therapy (LLLT) relies on delivering the proper amount of light energy to the scalp. For treatment to be effective, the light must be absorbed by the target tissue and reach the hair follicles beneath the skin.

Why Does Treatment Time Matter?

Laser therapy is not simply about turning on a light source. The scalp must absorb enough light energy to stimulate the biological processes involved in healthy hair growth.

According to research referenced by the Swedish Medical Society, approximately 20 minutes of treatment is needed to deliver an effective dosage of laser energy to the scalp.

While some devices advertise significantly shorter treatment times, proper light absorption requires sufficient exposure time.

Reaching the Hair Follicles

For laser therapy to be effective, light must penetrate the scalp and reach the target tissue beneath the skin.

Several factors influence how light is absorbed, including:

  • Wavelength
  • Beam diameter
  • Light dosage (fluence)
  • Distance between the laser source and the scalp

Because the scalp is one of the thicker areas of skin on the body, achieving adequate light penetration is especially important.

The Importance of Light Absorption

A fundamental principle of photochemistry, known as the Grotthuss-Draper Law, states that light must be absorbed in order to produce a biological effect.

In simple terms:

  • Light must reach the target tissue.
  • The target tissue must absorb that light.
  • Once absorbed, biological processes can be stimulated.

If light does not reach the desired depth, the intended photobiomodulation effects cannot occur.

Key Takeaway

Theradome treatment times are designed to deliver the amount of laser energy needed for effective scalp exposure. Proper treatment duration helps ensure that light reaches and is absorbed by the hair follicles and surrounding tissue.

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