Clinician Framed: Valo and Red Light Therapy for Stretch Marks
Red light therapy can modestly improve the look of early, red or purple stretch marks by calming inflammation and prompting collagen production, but it rarely does much for older, white stretch marks. Most people need a consistent trial lasting several weeks to see any change, and it works best as one piece of a broader skin routine rather than a fix on its own. A board-certified dermatologist can confirm whether your stretch marks are a good candidate before you invest time or money.
TL;DR:
- Red light therapy shows modest results mainly on early, red or purple stretch marks, with treatment needing several weeks to potentially see benefits.
- Effectiveness depends on wavelength and device design, as deeper dermal penetration is essential to stimulate collagen and remodel scars.
- The strongest improvements occur when treatment starts during the inflammatory phase of stretch marks and lasts for 8 to 12 weeks consistently.
- Devices like full-body beds are more suitable for treating large areas, while spot devices may be useful for smaller, localized marks.
- Combining light therapy with other treatments like microneedling, retinoids, and proper skin hydration enhances the chances of visible improvement.
Table of Contents
- How Red Light Therapy Affects Skin and Why It Matters for Stretch Marks
- What the Evidence Actually Shows About Light Therapy and Stretch Marks
- Who Is Most Likely to See Results, and When to Start
- A Practical Protocol: Devices, Dosing, and Safety Checks
- Pairing Light Therapy With Microneedling, Retinoids, and Moisturizers
- How Valo Red Light Devices Fit This Protocol
- A Clinician’s Honest Take on Stretch Mark Treatment
- Bringing This Protocol Into Your Routine With Valo
- FAQ
- Sources
How Red Light Therapy Affects Skin and Why It Matters for Stretch Marks
Red light therapy, also called photobiomodulation, uses specific wavelengths of light to trigger cellular activity in skin without heat or damage. Most devices rely on red light between 630 and 660 nanometers, which works near the skin’s surface, or near-infrared light between 830 and 850 nanometers, which reaches deeper into the dermis. A review of photobiomodulation mechanisms describes how this light energy is absorbed by mitochondria, setting off a chain of cellular responses relevant to scarring and stretch marks.
That chain includes a few specific effects:
- Fibroblasts, the cells responsible for building new tissue, become more active and produce more type I and type III collagen.
- Enzymes called matrix metalloproteinases, which break down damaged collagen, get modulated rather than left unchecked.
- Microcirculation improves, which can support nutrient delivery to repairing tissue.
Depth of penetration matters because stretch marks form in the dermis, not just the epidermis. A device that only affects surface skin will not reach the layer where the real remodeling needs to happen, which is why wavelength and device design both factor into whether a session does anything useful.
What the Evidence Actually Shows About Light Therapy and Stretch Marks
The science supporting red light therapy for stretch marks is promising but incomplete. The mechanistic case, fibroblast stimulation and reduced inflammation, is well established, but large randomized trials proving that red light therapy alone eliminates or significantly fades stretch marks do not exist yet. Most of what we know comes from small studies, case series, and research on related light-based treatments.
One relevant data point comes from a 675 nm laser study, which found significant improvement in stretch mark scores at six months after just three treatment sessions. That is a laser rather than a standard LED panel, but it demonstrates that certain light wavelengths can meaningfully change the texture and color of striae over time.
A few points are worth holding onto:
- Mechanistic plausibility is strong: collagen stimulation and anti-inflammatory effects are well documented in skin generally.
- Clinical evidence specific to stretch marks remains preliminary and often involves combination treatments rather than light therapy alone.
- The American Academy of Dermatology states plainly that stretch marks are permanent scars and that treatments can reduce their appearance but rarely erase them.
Early treatment timing drives most of the benefit seen in the research so far, since striae respond far better while still in their inflammatory phase than after they have matured and faded to white.
Who Is Most Likely to See Results, and When to Start
Stretch marks go through two distinct phases, and which one yours are in changes what to expect. Striae rubrae are the newer, red or purple marks, still inflamed and actively remodeling, which makes them the most responsive to red light therapy. Striae albae are older, pale, and essentially scar tissue with less blood flow, so light therapy tends to produce smaller, slower gains there.
A few things to weigh before starting:
- Skin tone and the underlying cause, whether pregnancy, rapid weight change, steroid use, or an endocrine condition, can affect healing speed and should factor into expectations.
- Stretch marks that appear suddenly, multiply quickly, or come with other symptoms deserve a clinical evaluation rather than a home device trial.
- A reasonable test run is 8 to 12 weeks of consistent sessions, tracked with dated photos taken in the same lighting and position each time.
If you are still in the red or purple stage, starting sooner rather than later gives you the best shot at visible change.
A Practical Protocol: Devices, Dosing, and Safety Checks
Choosing the right format matters as much as choosing the right wavelength. Handheld devices work for small, isolated marks, but panels or beds cover larger areas like hips, thighs, and the abdomen far more efficiently, which matters since stretch marks rarely show up in just one small spot. Formats like the Aura Red Light Bed or the Halo Red Light Bed are built for that kind of broad coverage rather than spot treatment.
- Choose a device emitting red light in the 630 to 660 nanometer range, ideally with near-infrared around 830 to 850 nanometers for deeper reach.
- Cleanse the treatment area and avoid applying photosensitizing topicals, such as certain acne medications or essential oils, before a session.
- Position yourself at the distance the manufacturer recommends, since irradiance drops off quickly with distance and affects how long a session needs to run.
- Protect your eyes if the device specifies it, particularly with higher-intensity panels or beds.
- Run sessions of roughly 5 to 15 minutes per area, 3 to 5 times a week for early-stage marks, for a minimum of 8 to 12 weeks before judging results.
- Photograph the area at baseline and at regular intervals under consistent lighting to track real change rather than guessing.
Pro Tip: Keep a simple log of session dates and lengths alongside your photos, since consistency matters more than any single session’s intensity.
Stop and check with a clinician if you notice increased redness, blistering, or irritation, or if you are pregnant, on a photosensitizing medication, or have a condition affecting skin healing. Device regulatory documentation for clinical light devices, including FDA review materials for light delivery systems, specifically flags photosensitivity as a contraindication worth discussing with a provider first.
Pairing Light Therapy With Microneedling, Retinoids, and Moisturizers
Red light therapy tends to work better as a supporting player than a solo act. Microneedling and fractional lasers currently have stronger evidence for improving stretch mark appearance, and combination approaches that pair microneedling with LED light have shown better cosmetic outcomes in small studies than either treatment alone.
Timing matters when stacking treatments:
- Wait 24 to 48 hours after microneedling before resuming light therapy sessions to avoid overstimulating healing skin.
- If you use a retinoid, apply it in the evening and save light therapy for a separate time of day, since retinoids can increase photosensitivity.
- Keep moisturizing and sun protection as a daily baseline. Collagen remodeling is gradual, and well-hydrated skin simply responds better to any active treatment layered on top.
How Valo Red Light Devices Fit This Protocol
Some device lineups map fairly directly onto the format guidance above. Beds and panels built around medical-grade components delivering clinically studied wavelengths matter for stretch marks since coverage area and consistent output both affect whether a protocol like the one above is realistic to follow at home.
- The Aura Red Light Bed suits larger treatment areas like the abdomen, hips, or thighs in a single session.
- The Halo Red Light Bed is built for full-body sessions when stretch marks span multiple regions.
- The Glow Serum Copper Peptide offers a topical option to layer into a routine between light sessions, alongside standard moisturizing.
None of these replace a dermatologist’s evaluation, but they address the practical device-format question that comes up once you have decided to try light therapy at all.
A Clinician’s Honest Take on Stretch Mark Treatment
Cautious optimism is the right posture here. If your stretch marks are still red or purple, consistent light therapy over a defined trial can realistically soften their appearance. If they have already faded to white, expect modest texture changes at best, not a disappearance.
Track progress with photos, not memory, and give any protocol its full 8 to 12 weeks before judging it. Stop and see a dermatologist if marks change rapidly, if you are managing a photosensitizing condition or medication, or if something about the presentation feels off.
— Andrew
Bringing This Protocol Into Your Routine With Valo
If you have decided red light therapy is worth a real trial, device choice is where most people get stuck, and this is where Valo’s lineup does the heavy lifting. The Aura Red Light Bed and Halo Red Light Bed are both built for the kind of large-area, full-body coverage that stretch marks on the hips, thighs, or abdomen actually need, rather than forcing you to reposition a small handheld panel dozens of times.
Pairing sessions with the Glow Serum Copper Peptide adds a topical layer for the days between light treatments. Browse the full range of panels, beds, and serums to find the setup that matches your treatment area, and check with a dermatologist before combining any device with prescription retinoids or in-clinic procedures.
FAQ
What color light therapy is best for stretch marks?
Red light in the 630 to 660 nanometer range is the most commonly used for stretch marks, often paired with near-infrared light around 830 to 850 nanometers for deeper reach. These wavelengths are associated with fibroblast activity and collagen production relevant to skin remodeling.
Does red light therapy tighten belly skin?
Red light therapy may modestly support collagen production, which can contribute to firmer-feeling skin over time, but it is not a substitute for surgical tightening. Results tend to be gradual and are more noticeable on early, actively remodeling skin than on long-stable areas.
Where should you not put red light therapy?
Avoid direct exposure to the eyes unless the device is specifically rated and used with recommended protection, and avoid treating active skin infections, open wounds, or areas with recent photosensitizing medication applied. Pregnant individuals or those with photosensitive conditions should check with a clinician before treating any area.
Can red light therapy help stretch marks that are already white?
Mature white stretch marks, known as striae albae, respond much more slowly to red light therapy than fresh red or purple marks, since they have less active blood flow and inflammation to influence. Expect subtle texture improvement at best, and consider combination treatments like microneedling for more noticeable change.
Sources
- Stretch marks: Why they appear and how to get rid of them — American Academy of Dermatology
- Photobiomodulation and skin: mechanisms and applications — PMC (review)
- 675 nm laser therapy for striae distensae — PubMed (2023)
- DEN230083 Valeda Light Delivery System — FDA review
