Microneedling + LED Therapy: The Science Behind a Perfect Pairing

Penn Smith, Master Esthetician

Of all the home skincare modalities I've explored over the years - and I've explored a lot! - microneedling is the nearest and dearest to my heart. Why? Because I know of no other modality that can give such profound results with such simple, consistent actions. It was the treatment I leaned on most heavily in my clinical practice, and it's the one I always come back to in my own routine.

But here's what's continued to come up in my research, in conversations with clients, and in my own experience: the best results didn't just come from the needling itself. They came from how well the skin healed afterward. And the more I studied the wound healing process, the more I understood what fibroblasts actually need to do their job, the more one modality kept surfacing as the perfect complement: red light therapy.

I know of nobody else in the industry who knows more about red light therapy than Bev May Sanderson, the founder of Maysama. So she's the perfect person for me to collaborate on this microneedling+LED content. Bev brings the deepest science on LED and photobiomodulation, and I bring the microneedling side - and together, we are perfectly paired to explain why these two treatments aren't just compatible, they're a match made in heaven.

Let's start with what microneedling is actually doing in the skin.

Why Microneedling Works: Controlled Injury, Not Trauma

Microneedling gets called a "collagen-induction treatment," but that phrase barely scratches the surface of what's happening biologically. The real magic lies in the wound healing cascade - a beautifully orchestrated process that begins the moment we create tiny microchannels in the skin.

These micro-injuries are intentional and controlled. They're designed to trigger a repair response without causing damaging inflammation or scarring. The body recognizes the disruption almost immediately, releasing signalling molecules that recruit immune cells and activate repair pathways. Blood flow increases, growth factors are released, and the skin shifts into a regenerative state.

The process unfolds in stages. During the initial inflammatory phase, the skin sends out chemical signals that essentially say "repair needed here." This stage is necessary - even if it looks/feels dramatic on the surface as redness or warmth. Without it, the downstream regeneration simply doesn't happen.

Next comes proliferation - and this is where it gets exciting. This is the phase where fibroblasts take center stage. These are our collagen-producing powerhouses. Fibroblasts migrate into the microchannels created by the needles, multiply, and begin producing new collagen, elastin, and extracellular matrix proteins. They're not just building collagen - they're organizing it.

Finally, the remodelling phase begins. Over weeks and months, collagen fibers reorganize, strengthen, and integrate into the existing dermal structure. This is where the long-term improvements in firmness, texture, and resilience develop.

Anyone who's experienced microneedling knows that it comes with a period of recovery. Redness, warmth, temporary sensitivity - these are all part of the process. And while some inflammation is absolutely essential (it's the trigger for everything that follows), prolonged or excessive inflammation can slow recovery and interfere with optimal collagen organization.

This is where, years ago when I was still doing microneedling in the treatment room, I started asking a different question. Instead of just focusing on soothing ingredients and barrier repair for aftercare - which certainly play a role - I became interested in supporting the cellular energy systems of the skin. What if, instead of simply reducing visible redness at the surface, we could help fibroblasts and surrounding cells move more efficiently from a defensive state into an active repair phase?

As I studied the work of Dr. Lance Setterfield - whose book The Concise Guide to Dermal Needling is essential reading - and dug deeper into what fibroblasts actually need to produce high-quality collagen, I kept arriving at the same conclusion: red light therapy doesn't compete with microneedling. It supports it at the cellular level.

And that's where I'm going to hand things over to Bev, because the science behind how light does this is genuinely fascinating.

 

How Red Light Therapy Influences the Healing Environment

Bev May Sanderson, Founder, Maysama

Thank you, Penn - and this is exactly the conversation I love having, because so many people think of LED as only a standalone treatment when its real power often lies in how it supports other modalities.

Red light therapy - more formally known as photobiomodulation - uses specific wavelengths of visible red and near-infrared light to influence cellular behaviour. Unlike treatments that rely on heat or mechanical stimulation, photobiomodulation works by interacting with light-sensitive components inside our cells.

Red wavelengths, typically between 630 and 660 nanometres, primarily affect the upper layers of the skin. Near-infrared wavelengths — in the 780 to 850 nanometre range — penetrate more deeply into tissue. Together, they create a multi-layered biological response.

One of the most studied effects is the influence on mitochondrial activity. Mitochondria produce ATP - the molecule that fuels almost every biological process, including the collagen synthesis and cell migration that Penn has just described. By supporting mitochondrial function, red and near-infrared light can increase the energy available for repair. Think of it this way: Penn's microneedling gives fibroblasts the signal to work. Photobiomodulation helps give them the fuel to do that work efficiently.

At the same time, photobiomodulation appears to reduce oxidative stress and modulate inflammatory signalling. Importantly, it doesn't shut inflammation down completely - which, as Penn explained, would be counterproductive. Instead, it helps the skin transition more efficiently into the proliferative phase of healing. This may translate into reduced downtime and a smoother recovery experience.

This is where it gets particularly compelling, because recent wound-healing research has given us direct insight into how light affects fibroblasts - the very cells Penn relies on to rebuild the dermis after microneedling.

Studies using red and near-infrared wavelengths have shown that fibroblasts exposed to photobiomodulation demonstrate increased migration, enhanced proliferation, and improved extracellular matrix organisation. In practical terms, the cells responsible for rebuilding collagen appear to move into treated areas more quickly and remain more resilient within inflammatory environments.

One recent model examining chronic wound healing found that fibroblast numbers increased dramatically within the first few days following exposure to pulsed red and near-infrared light. Now, chronic wounds are different from controlled cosmetic treatments - but they provide valuable insight into the biological strength of photobiomodulation. If light can support healing in compromised tissue, it suggests meaningful potential in healthy skin recovering from microneedling.

Perhaps even more important than speed is the quality of collagen that forms during healing. Fibroblasts don't simply produce collagen at random; they organise it. Research indicates that near-infrared wavelengths may influence extracellular matrix remodelling in a way that encourages more structured collagen alignment. This distinction matters because well-organised collagen contributes to smoother texture and stronger skin, whereas disorganised collagen can lead to fibrosis or uneven results.

In other words, red light therapy isn't just calming redness. It may be influencing the architecture of healing itself.

 

The Evolving Science of Light and Skin

For many years, discussions about photobiomodulation focused heavily on specific enzymes like Cytochrome C Oxidase as the primary light receptors. More recently, researchers have begun exploring a broader perspective — suggesting that interfacial water, the structured layer of water surrounding cell membranes, may also play a significant role in how near-infrared light interacts with biological tissue.

While the science continues to evolve, this has an important practical implication. Instead of thinking about light therapy as requiring ultra-precise, single wavelengths, we're recognising that beneficial biological responses occur across broader ranges of red and near-infrared light. The most effective results have been consistently reported using red light at 630–660 nm and near-infrared at 780–850 nm, with fluences of 3–5 J/cm².

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