Stretch marks (striae) are a common skin concern caused by rapid stretching of the skin due to pregnancy, weight changes, or growth spurts. While they’re harmless, many seek ways to reduce their appearance.Can red light therapy (RLT) help? Here’s what the science says.
1. How Red Light Therapy May Improve Stretch Marks
RLT works by stimulatingcollagen and elastin production, key proteins that keep skin firm and elastic. Research suggests it may help by:
✔Increasing collagen synthesis – Thickens skin and improves texture.
✔Enhancing blood flow – Promotes healing and skin regeneration.
✔炎症の減少 – Helps fade red/purple stretch marks (striae rubra).
Clinical Evidence
- あ 2023 Journal of Cosmetic Dermatology study found RLT improved skin elasticity and reduced stretch mark depth after 12 週.
- Near-infrared (nir) light may penetrate deeper to remodel connective tissue.
2. Best Red Light Therapy Protocols for Stretch Marks
あ. Wavelengths to Use
- 赤信号 (630-660 nm) – Best for surface-level collagen stimulation.
- Near-infrared (810-850 nm) – Targets deeper tissue for severe or older stretch marks (striae alba).
B. Treatment Frequency & Duration
- 3-5 sessions per week (consistency is key).
- 5-15 minutes per area (depending on device power).
- Minimum 8-12 週 for visible results.
C. Device Recommendations
- Handheld RLT devices (例えば, Joovv Go, Mito Red Light) – For small areas.
- Large LED panels – For broader coverage (例えば, thighs, abdomen).
- Professional in-office treatments – More powerful (例えば, LED light beds).
3. How to Maximize Results
✅Exfoliate first – Removes dead skin for better light absorption.
✅Use hyaluronic acid or vitamin C serum – Enhances collagen effects.
✅Combine with microneedling or retinoids – Boosts skin remodeling (check with a dermatologist).
🚫Avoid sunburn/tanning – Can worsen stretch mark contrast.
4. Realistic Expectations
- Best for newer (red/purple) stretch marks – More responsive than old (white/silver) ones.
- Gradual improvement – Unlike lasers, RLT works slowly but safely.
- May not fully erase deep scars but can significantly reduce visibility.
Before & After: What to Expect
| Timeframe | Results |
|---|---|
| 4-6 週 | Improved skin texture, slight fading |
| 8-12 週 | Noticeable reduction in color/depth |
| 6+ months | Optimal results (with consistent use) |
5. Alternative & Complementary Treatments
If RLT isn’t enough, consider combining with:
- Fractional lasers (例えば, Fraxel) – For deeper scars.
- Microdermabrasion – Exfoliates top layers.
- Topical retinoids – Promotes cell turnover (avoid during pregnancy).
Final Verdict
✔RLT is a safe, non-invasive option to improve stretch marks, especially when started early.
✔Consistency is crucial—results take weeks to months.
✔For best outcomes, pair with skincare and professional treatments.
Try this routine:
- Exfoliate 2x/week.
- Apply RLT 5-10 mins daily (660nm + 850nm).
- Moisturize with collagen-boosting creams.
