Red light therapy helps boost collagen production by activating cells called fibroblasts. Clinical studies have shown that with regular use over 8 to 12 weeks, people can see a real increase in collagen density. The process is reliable and typically leads to noticeable improvements, though results can vary based on individual expectations. If you’re interested in trying it out, we use red light panels in our recovery programs at our studios in Brisbane and the Sunshine Coast.

The short answer

Red light therapy operates on collagen, but not in the way you will find it being described in most marketing campaigns. This therapy does not have magical powers that instantly eliminate wrinkles. All that red light therapy does is ensure that your skin cells produce extra amounts of collagen and elastin, leading to tighter skin, better skin texture, reduced wrinkles, and an overall improvement in skin tone.

What the research shows

A 2014 controlled trial published in Photomedicine and Laser Surgery treated 113 participants with red and near infrared light over 30 sessions and documented an intradermal collagen density increase alongside reductions in skin roughness and visible signs of skin ageing. Other clinical trials have replicated the pattern: consistent exposure to specific wavelengths leads to measurable improvements in skin elasticity and wrinkle reduction. A single-blinded clinical study using 660 nm LEDs found the same direction of effect, with reduced wrinkle depth and surface roughness in over 90% of participants.

The scientific evidence is strongest for fine lines, skin texture, tone, and overall rejuvenation. There are also some positive effects on deeper structure, though the evidence is not so strong. The patient satisfaction level in most of the studies was found to be very high, but the ones who had seen the most improvement followed the regimen to its completion.

How red light triggers collagen production

Light in the red range (more specifically in the range of 630 to 850 nanometres) passes through the skin and gets absorbed by a substance in the mitochondria known as cytochrome c oxidase. This is the very enzyme responsible for the metabolic process in cells. When it absorbs red and near infrared light, it produces nitric oxide and generates ATP.

Increased amounts of ATP result in increased energy availability for cell functions. In relation to your skin cells, these include production of new proteins, cell repair, creation of collagen, and production of elastin. This is the foundational mechanism behind most low level laser therapy and photomedicine applications, including wound healing and tissue repair.

What are fibroblasts?

Your fibroblasts are the cells found in your dermis that produce collagen. Fibroblasts also produce elastin, which gives your skin its elasticity. As you get older, the activity of your fibroblasts starts to decrease. As such, there is reduced collagen and elastin production, causing wrinkles.

Red light therapy works to stimulate the actions of fibroblasts. Experiments with LED light panels and low-level laser therapy indicate that there is an increase in collagen production in areas where the treatment has been applied, along with elastin production benefits. The connection between red light and ageing skin is unpacked further in our guide to the anti-ageing benefits of red light therapy.

The wavelengths that reach collagen-producing cells

Not all red light is the same. The visible red light (which operates between 630nm and 660nm) acts upon the uppermost layers of the skin and is ideal for addressing any superficial problems and minor inflammation. However, the near infrared light (between 810nm and 850nm) acts even further down and hits the fibroblasts in the dermis that produce collagen.

That is precisely why the majority of clinical-quality units produce red and near-infrared light at the same time. You are addressing both layers in one go. Units that produce only red light in the visible spectrum range will be able to smooth your skin but will not penetrate into the skin producing collagen. There’s more on how these wavelengths compare to heat-based light therapy in our breakdown of red light therapy vs infrared sauna.

When you should expect to see results

Most people usually begin experiencing minor improvements in the appearance of their skin within the first month after undertaking a series of treatments, usually ranging from three to five times per week. Most people usually begin experiencing more significant improvements after eight to twelve weeks, where they will notice their skin becoming firmer and the presence of fewer fine lines.

For those seeking immediate results, this method may not be suitable. However, if you’re prepared to stick to a consistent routine, the benefits will gradually multiply.

Why does it take this long?

Collagen turnover is slow. When stimulation leads to the formation of new collagen by fibroblasts, it occurs as immature collagen fibres that have to undergo cross-linking and remodelling into a mature collagen structure. It normally takes 6 to 12 weeks for this to occur.

The collagen you have now also has a half-life of approximately 15 years at a deeper level of skin structure, although much faster on the surface layer of your skin, which is the target of red light therapy. This means that when you begin treatment, you do not replace your old collagen right away, but instead you continue to add new collagen to the current stock while damaged fibres are continuously broken down and renewed. This is biology, not marketing.

What red light therapy can and cannot do for your skin

With a consistent skincare routine that includes regular red light exposure, the changes most people see are reduced fine lines around the eyes and mouth, improved overall skin texture and a smoother surface, better skin tone, and a subtle reduction in redness, faster healing of minor breakouts and post-inflammatory marks, and a general firmness from increased collagen and elastin in the upper dermis.

Red light therapy also supports wound healing and tissue repair more broadly, which is why it’s used in clinical settings for everything from post-surgical recovery to managing certain common skin conditions like mild acne and rosacea. A wider list of these applications is covered in our overview of red light therapy benefits, and recent molecular work has shown that red light upregulates the genes coding for type I and type II collagen, which helps explain why effects extend beyond surface texture.

Where expectations need adjusting

Deep static wrinkles that are etched into the skin from decades of expression won’t disappear. Significant sagging from volume loss won’t tighten substantially. If your skin concerns are structural rather than textural, red light therapy will help at the margins but won’t replace what a dermatologist or cosmetic professional offers.

It will not reverse any damage from the sun that has already occurred at a structural level, but it can certainly help to improve the appearance of your skin. While red light therapy continues to be explored for uses like stimulating hair growth, reducing scarring, wound healing, and even a variety of medical conditions, there is far more research supporting collagen.

How red light therapy compounds with other recovery modalities

Red light therapy in isolation works. Red light therapy stacked into a protocol with complementary modalities works better, and the reason is mostly about blood circulation and cellular energy.

Pairing with sauna and contrast therapy for circulation

Sauna treatment leads to vasodilatation. Blood vessel dilation takes place, resulting in increased peripheral blood flow, which enhances oxygen and nutrient supply to the skin. Heat exposure has its own effect on the dermis too, with regular use linked to a range of infrared sauna skin benefits, including improved tone and elasticity. Contrast therapy alternating between heat and cold drives circulation even harder through repeated vasoconstriction and vasodilation cycles, flushing the skin with fresh blood and supporting lymphatic drainage. If you want the underlying physiology in more depth, our explainer on what contrast therapy is and how it works covers it.

As a result of applying red light therapy after a sauna or contrast treatment, the fibroblasts are undergoing phototherapy on tissues that are already well prepared through increased blood flow and oxygenation. The mitochondria’s reaction to red and infrared light is determined by the physiological condition of the cells. Improved circulation enhances material supply for collagen production.

Why a protocol-based approach outperforms isolated treatments

A single modality used in isolation gives you a single mechanism. A structured protocol that sequences sauna, contrast therapy, red light panels, and cold exposure in one visit gives you compounding effects across thermoregulation, circulation, inflammation reduction, and direct cellular stimulation. The order matters too, which is why we’ve written separately about whether to sauna before or after an ice bath.

This is why TH7’s recovery protocols are built around sequenced modalities rather than standalone bookings. The collagen response from red light is amplified when the tissue receiving treatment is already in a state of improved blood flow and reduced systemic inflammation. It’s also why people often report more visible skin changes when red light is part of an ongoing recovery practice rather than a one-off appointment.

At-home devices vs in-clinic panels

Home devices

Most at home device options on the market have two problems: low irradiance and small coverage area. Irradiance measures how much light energy reaches your skin per square centimetre, typically expressed in milliwatts. Clinical research showing collagen density gains generally uses irradiance levels of 30 to 100 mW/cm² at the skin surface. Many handheld at-home red light therapy devices deliver well below that range, meaning your sessions need to be much longer to accumulate the same dose, if they can deliver it at all.

Coverage is the second issue. A handheld wand or small mask might treat a section of your face at a time, requiring 20 to 30 minutes of careful repositioning per session. Most people don’t sustain that routine.

It does not mean that the home equipment is entirely worthless. A decent LED panel by a reliable company will do the job. However, “decent” and “reliable” bear a lot of weight here.

Clinical-grade panels

An in-clinic panel will provide greater irradiance over a whole body coverage surface, so a 10 to 15-minute exposure is sufficient to fully expose your body to light at therapeutic levels. This means that you will receive a near-infrared light exposure at scientifically proven wavelengths with reliable output in just a fraction of the time. If you take collagen and recovery seriously, the efficiency alone will often make up for the cost difference. If you are using red light as part of your recovery process alongside sauna or contrast therapy, an in-clinic experience fits seamlessly.

Is red light therapy safe?

Red light therapy is generally safe for most people. Unlike ultraviolet light, red and near-infrared light do not cause any harm to DNA structure and do not increase chances of developing skin cancer. Additionally, red light does not have photoaging effects caused by ultraviolet light exposure or sleep disruptions caused by blue light exposure.

Side effects to know about

The side effects are very minimal. A few people may suffer from redness or a warm sensation in the affected area for a short while just after treatment, which is usually cleared up in less than an hour. Eye fatigue may result from overuse if you do not use the provided goggles. Headaches are rarely reported.

People with darker skin can use red light therapy safely. Unlike some laser surgery and intense pulsed light treatments, red and near infrared wavelengths don’t selectively target melanin and don’t carry the same pigmentation risks across different skin tones.

Who should check with a professional first

A short conversation with your GP makes sense if you have a history of skin cancer or are currently being treated for a skin lesion, if you take photosensitising medications (some antibiotics, retinoids, certain antidepressants, or specific acne treatments), if you have an active autoimmune condition affecting the skin, or if you’re pregnant and want to confirm comfort with the protocol.

For most healthy adults with no specific health conditions, red light therapy slots into a skincare routine and recovery practice without complications.

Try red light therapy at TH7

Red light therapy is available across TH7’s studios as part of structured recovery protocols. Sessions pair clinical-grade panels with complementary modalities like sauna and contrast therapy, so the collagen response sits within a broader practice rather than standing alone. Book a session in Brisbane, Cleveland, or on the Sunshine Coast to feel the difference.

FAQs

Does red light therapy work for deep wrinkles or just fine lines?

It is most effective when used with fine lines and skin texture. Wrinkles that have developed as a result of expression over many years, or because of volume loss, cannot be erased using just red light therapy. You may see some effects, but for any structural change, you will have to talk to a cosmetic expert.

How often do you need red light therapy to maintain collagen results?

After the initial 8 to 12 week build phase with three to five sessions per week, most people maintain results with two to three sessions weekly. Collagen synthesis slows if you stop entirely, so consistency is what holds the gains in place.

Can you combine red light therapy with retinol or other actives?

Yes, and the two together work great for many people. The retinol acts to boost your collagen synthesis by using a completely different method, which means the results are cumulative. Apply the actives on an alternate day from the day that you apply the red light therapy.

Does red light therapy help with collagen on the body, not just the face?

Yes. Full-body panels will target the cells that produce collagen regardless of their location. People apply this product to areas such as the neck, chest, hands, abdomen and thighs.

Is red light therapy worth it if you are under 30?

The production of collagen begins to decrease from around the age of 25, which means that applying red light therapy at the age of 28 would be mostly preventive and maintenance-related. Worthwhile or not is a matter of personal preference and commitment.