Hair Growth Stimulation

For individuals exploring red light therapy (RLT) as a method for stimulating hair growth, it's crucial to understand the scientific underpinnings of this treatment, review the existing research, consider important factors before starting therapy, and draw an informed conclusion.

Scientific Basis

Red light therapy, also known in scientific terms as photobiomodulation, employs specific wavelengths of light, particularly in the red to near-infrared spectrum. This therapy is believed to work for hair growth by stimulating the cells in the scalp and hair follicles. The theory is that light at these wavelengths can penetrate the skin and be absorbed by the mitochondria in the cells of the hair follicles. This absorption may enhance the energy production in cells, potentially leading to increased activity in the hair follicles and promoting hair growth.


Research on RLT's effectiveness for hair growth includes:

  • Stimulating Hair Follicles: Studies have shown that RLT can stimulate hair follicles, potentially leading to increased hair growth and thickness.
  • Improving Scalp Health: RLT may improve blood circulation in the scalp, providing better nourishment to hair follicles.
  • Effect on Hair Cycle: Some research suggests that RLT might prolong the anagen (growth) phase of the hair cycle, which could result in longer, more robust hair growth.

Considerations Before Treatment

Before embarking on RLT for hair growth, several factors should be considered:

  • Consultation with Dermatologists or Trichologists: Professional advice is crucial, especially for individuals with underlying scalp conditions or hair loss due to medical reasons.
  • Understanding Limitations: Realizing that RLT may not work for everyone and its efficacy can vary based on the individual’s condition and the cause of hair loss.
  • Quality of Devices: Ensuring the use of medically-approved and effective RLT devices is important for safety and effectiveness.
  • Managing Expectations: Recognizing that hair growth can be a slow process and RLT might take time to show results.


Red light therapy offers a promising, non-invasive avenue for stimulating hair growth, with scientific evidence supporting its potential efficacy. The therapy's ability to energize hair follicles and improve scalp health could make it a valuable tool in combatting hair loss. However, it's important for individuals to consult with healthcare professionals, understand the research and limitations, and use high-quality devices for treatment. As research in this field progresses, RLT could become an increasingly recognized method for addressing hair growth concerns.