Stretch Marks & Laser Therapy: A Science-Based Approach to Skin Remodeling

Understanding how photobiomodulation supports collagen repair and skin health

Stretch marks—medically known as striae distensae—are a common skin concern affecting both men and women. While often associated with pregnancy, they can also result from rapid growth, weight changes, hormonal shifts, or muscle gain.

At The Ageless Skin Co., medical-grade laser therapy is used as a non-invasive approach to support skin repair, collagen remodeling, and improved texture.

What Are Stretch Marks?

Stretch marks occur when the skin is stretched beyond its elastic capacity, leading to structural disruption within the dermis.

This disruption affects key components:

• Collagen fibers (provide strength)

• Elastin fibers (provide flexibility)

When these fibers tear or become disorganized, visible lines form on the skin.

The Two Stages of Stretch Marks

Stretch marks evolve over time and present differently depending on their stage:

1. Striae Rubrae (Early Stage)

• Red, purple, or pink in color

• Increased vascularity (blood flow)

• Often slightly raised or inflamed

2. Striae Alba (Mature Stage)

• White or silvery appearance

• Reduced blood supply

• Thinner, more atrophic skin

Early-stage stretch marks tend to respond more quickly to treatment due to their active vascular and inflammatory components.

The Role of Collagen in Skin Repair

Collagen is the primary structural protein in the skin. In stretch marks, collagen becomes:

• Fragmented

• Disorganized

• Reduced in density

Effective treatment focuses on stimulating new collagen production and reorganizing existing fibers—a process known as dermal remodeling.

How Laser Therapy Works

Low-level laser therapy (LLLT), or photobiomodulation, uses red and near-infrared light (600–1000 nm) to penetrate the skin and interact with cells at a mitochondrial level.

This interaction leads to:

• Increased ATP production (cellular energy)

• Activation of fibroblasts (collagen-producing cells)

• Enhanced microcirculation

• Modulation of inflammatory pathways

These biological effects support the skin’s ability to repair and regenerate.

What the Research Shows

Scientific studies on photobiomodulation demonstrate several key effects relevant to stretch marks:

✔ Increased Collagen Synthesis

Research shows that laser therapy can stimulate fibroblast proliferation and increase Type I and Type III collagen production, both essential for improving skin structure.

✔ Improved Skin Elasticity

Clinical findings suggest enhanced elastin organization and improved skin flexibility following consistent treatment.

✔ Enhanced Tissue Remodeling

Photobiomodulation supports the reorganization of collagen fibers, leading to smoother skin texture and reduced depth of stretch marks.

✔ Increased Blood Flow

Improved microcirculation delivers oxygen and nutrients necessary for tissue repair, particularly beneficial in early-stage stretch marks.

What Results Can You Expect

Research supports measurable improvements in:

• Skin texture and smoothness

• Colour blending with surrounding skin

• Elasticity and firmness

• Overall appearance of stretch marks

  
  

Results develop gradually over a series of treatments as collagen remodeling takes place.

Who Is a Good Candidate?

Laser therapy may be beneficial for individuals who:

• Have new or mature stretch marks

• Prefer a non-invasive, needle-free option

• Want to improve skin quality rather than mask it

• Are consistent with treatment over time

  
  

A Responsible Approach

Stretch marks are a natural and common skin change. Treatment should be approached with realistic expectations and a focus on skin health and function.

Laser therapy is considered a supportive, non-invasive modality and may be combined with other treatments depending on individual goals.

Scientific References

Watson, R. E. B., Parry, E. J., Humphries, J. D., Jones, C. J., Polson, D. W., Kielty, C. M., & Griffiths, C. E. M. (1998). Fibrillin microfibrils are reduced in skin exhibiting striae distensae. British Journal of Dermatology, 138(6), 931–937.

Lee, K. S., Rho, Y. S., Jang, S. I., Suh, M. H., & Song, K. Y. (1994). Decreased expression of collagen and fibronectin genes in striae distensae tissue. Clinical and Experimental Dermatology, 19(4), 285–288.

Korgavkar, K., & Wang, F. (2015). Stretch marks during pregnancy: a review of topical prevention. British Journal of Dermatology, 172(3), 606–615.

Avci, P., Gupta, A., Sadasivam, M., Vecchio, D., Pam, Z., Pam, N., Hamblin, M. R. (2013). Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. Seminars in Cutaneous Medicine and Surgery, 32(1), 41–52.

Barolet, D., & Boucher, A. (2010). Prophylactic low-level light therapy for skin: a review. Journal of Cosmetic and Laser Therapy, 12(6), 303–314.

Hamblin, M. R. (2017). Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. AIMS Biophysics, 4(3), 337–361.