The products are the same. The routine is the same. What changed is the power supply running underneath all of it. When cellular energy output in skin declines, active ingredients have less fuel available to power the biological responses they are designed to trigger.
Mechanism: Mitochondrial DNA accumulates damage, NAD+ levels fall, and the cellular cleanup program for broken mitochondria slows with age. ATP output drops across all skin cell populations.
Target: Energy supply inside fibroblasts and keratinocytes, the cells that build collagen and maintain the skin barrier.
Outcome: Collagen synthesis slows, barrier recovery weakens, UV repair stalls. Visible aging accelerates beyond what any topical can compensate for.
Mechanism: Photons at 630nm and 850nm are absorbed by cytochrome c oxidase, the terminal enzyme of the mitochondrial electron transport chain. The absorption displaces inhibitory nitric oxide, restores electron flow, and drives the proton gradient that ATP synthase uses to produce ATP.
Target: Mitochondria inside dermal fibroblasts and epidermal keratinocytes, directly under the device surface.
Outcome: ATP output rises within minutes. The elevated energy state persists for hours and supports collagen synthesis, barrier repair, and faster cellular recovery.[3,4]
Mechanism: Mitophagy is the cellular program that identifies and destroys damaged mitochondria so the cell can replace them with functional ones. When it slows, broken mitochondria pile up and suppress the output of healthy ones operating around them.
Target: The mitochondrial population inside skin and muscle cells. A smaller, cleaner population outperforms a larger, degraded one.
Outcome: Cellular energy infrastructure is rebuilt at the source. Output improves because the machinery is renewed, not just stimulated.[7,8]
Educational Disclaimer. This article is for informational purposes only and does not constitute medical advice. Supplements, photobiomodulation protocols, and training interventions vary in individual response and clinical evidence quality. Consult a qualified physician before initiating any new protocol, particularly if you take photosensitizing medications or have a diagnosed metabolic or mitochondrial condition.
Executive Summary
- Most major biological processes in a skin cell run on ATP. Collagen production, barrier repair, UV recovery: each requires adenosine triphosphate to execute. When mitochondrial output drops, these processes slow as available cellular energy falls.[1,2]
- The decline in human skin is measurable and documented. A 2023 study in Experimental Dermatology found significantly reduced ATP synthase proteins and electron transport chain markers in the epidermis of older donors compared to young donors, and identified the gap as a direct restriction on the skin's capacity to regenerate.[1]
- Three things drive the collapse simultaneously: mtDNA damage, NAD+ depletion, and slowed mitophagy. Each degrades ATP output through a different pathway. Address only one and the others keep working against you.[11]
- Red and near-infrared light at 630nm and 850nm directly target the mitochondrial enzyme whose activity drives ATP synthesis. Sham-controlled trials document collagen density gains and wrinkle depth reductions of 20 to 36 percent over 8 to 12 weeks of consistent use.[5,6,12]
- Urolithin A is one of the only oral compounds confirmed to activate mitophagy in humans. A 2024 systematic review found consistent gains in mitochondrial gene expression, reduced inflammation, and improved physical performance across human trials at multiple doses.[8]
- When mitochondrial efficiency declines system-wide, vital organs maintain priority access to oxygen and substrates through blood flow. Heart, brain, and liver receive preferential oxygen delivery, which allows those cells to sustain their own ATP production. Skin, as a lower-priority tissue, receives reduced oxygen delivery under metabolic stress, limiting how much ATP its cells can generate.[2,11]
- Cellular energy state significantly influences how effectively topical actives perform. Most active ingredients trigger biochemical responses that require ATP at multiple steps. A skin cell with reduced mitochondrial output has less capacity to execute those responses fully. Restoring cellular energy improves the cell's ability to act on the signals those ingredients provide.[1,3]
Your Skin Runs on a Battery. Here Is What Drains It.
Inside every skin cell, there are thousands of tiny structures called mitochondria. Their job is simple: take in oxygen and nutrients, and convert them into ATP. Adenosine triphosphate. That is the molecule every cell in your body uses as usable energy, the way a machine uses electricity. When ATP is available, skin cells do their jobs. When it runs low, they stop.
Collagen production requires ATP. Barrier repair requires ATP. Recovery after sun exposure requires ATP. The cell cycle that replaces dead skin cells every 28 or so days requires ATP. Every biological process your skin performs is downstream of that single energy molecule.[1]
Mitochondria produce ATP through a process called oxidative phosphorylation. That process runs along a chain of protein complexes embedded in the mitochondrial inner membrane, called the electron transport chain. The terminal enzyme in that chain, cytochrome c oxidase, pumps protons across the inner membrane, generating an electrochemical gradient. ATP synthase then uses that gradient to produce ATP. This enzyme matters because cytochrome c oxidase is the specific target for red and near-infrared light therapy.[3]
Now here is where it gets important. A 2023 study published in Experimental Dermatology analyzed skin samples from donors across a 50-year age range and found a significant drop in ATP synthase proteins and key electron transport chain markers in older skin. The researchers concluded that this energy shortfall directly restricts skin's ability to regenerate. The cells are still there. They just have less power to run.[1]
A 2025 study in the Journal of Investigative Dermatology went further. Researchers removed a critical mitochondrial protein, TFAM, specifically from keratinocytes in mice. The result was direct and causal: without functional mitochondria in skin cells, the mice developed accelerated skin aging, barrier failure, and structural breakdown. Mitochondrial decline drives skin aging. It is not a side effect of it.[2]
"Age-induced reductions of epidermal ATP synthase create an energy shortfall that restricts skin regenerative potential by disrupting the mitochondrial structures responsible for energy production."
Vidali et al., Experimental Dermatology, 2023Three things happen simultaneously as the system degrades. First, mitochondrial DNA accumulates damage from the reactive oxygen species produced during normal ATP synthesis. This is unavoidable chemistry: the same process that generates energy also generates the byproducts that chip away at the DNA guiding that process. Over decades, the efficiency of the electron transport chain drops.[11]
Second, NAD+ declines. NAD+ is the molecule mitochondria use as raw material to shuttle electrons through the transport chain. Without enough of it, the chain slows and produces less ATP per unit of oxygen consumed. After early adulthood, NAD+ levels fall progressively, partly because an enzyme called CD38 increases with age and destroys NAD+ as part of immune signaling. Skin cells sitting in a relatively low-oxygen environment feel this deficit early.[10,11]
Third, mitophagy slows. Mitophagy is the cellular quality control program that identifies damaged mitochondria and breaks them down so new ones can be built. When this program falls behind, damaged mitochondria accumulate. And here is the counterintuitive part: a cell full of broken mitochondria produces less ATP than a cell with fewer, fully functional ones. The broken ones consume resources and suppress the output of the healthy ones around them. Volume without quality is a net loss.[7,8]
On top of this, the body maintains a priority system for oxygen and substrate delivery through blood flow. Cardiac muscle, the brain, the liver, and the kidneys receive preferential oxygen supply under metabolic stress. Skin, as a lower-priority tissue for oxygen delivery, has reduced capacity to sustain its own ATP production when the body's overall metabolic efficiency declines. Changes in men over 40 skin that appear as products suddenly underperforming are frequently the visible consequence of this dynamic: skin cells producing less of their own ATP.[2,11]
What the Clinical Evidence Actually Shows
The strongest data sits in photobiomodulation. Multiple independent research groups have run sham-controlled randomized trials on red and near-infrared light, and the results are consistent enough to draw conclusions from.
Wunsch and Matuschka enrolled 113 subjects across two LED wavelength ranges, 611 to 650nm and 570 to 850nm, with a sham control group. After 30 sessions, both active treatment groups showed statistically significant improvements in collagen density measured by ultrasound, in skin roughness by profilometry, and in patient-rated skin quality. This was a controlled trial with objective measurements, not a survey.[5]
Lee and colleagues ran a split-face design, treating one side of the face with 633nm and 830nm light while the other side received sham treatment. The treated side showed wrinkle depth reductions of up to 36 percent and elasticity gains of up to 19 percent. The split-face design eliminates lifestyle and systemic variables because both sides of the face share the same blood supply, sleep, and diet.[6]
A 2025 multi-center, randomized, double-blind, sham-controlled study on home-use LED devices specifically for crow's feet confirmed improvements with consistent sessions over 12 weeks.[12] The mechanism running beneath all of these results is the same: cytochrome c oxidase absorbs photons at red and near-infrared wavelengths, restores electron flow, drives the proton gradient, and enables greater ATP production by ATP synthase in the cells directly under the device.
On urolithin A, a 2024 systematic review by Kuerec and colleagues analyzed human trials at multiple doses. The findings showed consistent increases in mitochondrial gene expression markers, reductions in inflammatory markers, and improvements in physical performance in older adults. The key finding was that urolithin A activates mitophagy, the damaged-mitochondria clearance program, in humans. Most compounds that show mitophagy effects in cell studies fail to replicate in humans. Urolithin A is an exception.[7,8]
The exercise story got complicated in 2025. A narrative review by Storoschuk and colleagues examined the popular claim that Zone 2 cardio, low-intensity exercise below the lactate threshold, is the optimal stimulus for building new mitochondria. The review found that Zone 2 does not consistently activate PGC-1α, the protein that switches on mitochondrial biogenesis genes, in non-athletes. Higher-intensity exercise activates PGC-1α more reliably. The implication: if building mitochondrial capacity is the goal, the low-and-slow approach needs to be reconsidered for most people.[9]
| Intervention | What It Does to Mitochondria | Skin-Relevant Outcome | Evidence Quality |
|---|---|---|---|
| Red/NIR light at 630nm and 850nm | Activates cytochrome c oxidase, displaces inhibitory nitric oxide, raises ATP output in irradiated cells | Collagen density gains, wrinkle depth reduction 20 to 36%, elasticity gains up to 19% over 8 to 12 weeks | Strong: multiple independent sham-controlled RCTs |
| Urolithin A | Activates PINK1-Parkin mitophagy pathway, clears damaged mitochondria, triggers rebuilding of clean ones | Increased mitochondrial gene expression, reduced inflammation, improved physical performance in humans | Moderate: human evidence growing, mechanisms well-established |
| High-intensity exercise | Activates AMPK and p38 MAPK, triggers PGC-1alpha, the master switch for building new mitochondria | Systemic mitochondrial density increase; indirect benefit to skin energy availability | Strong systemically; skin-specific effect is indirect |
| NAD+ precursors: NMN and NR | Restores NAD+ availability, supports sirtuin pathway activation and mitochondrial quality control | Mitochondrial function improvements in early human data; skin-specific outcomes limited | Emerging: human data developing, preclinical mechanisms solid |
| Overnight fasting (12 to 16 hours) | Inhibits mTOR, activates autophagy and mitophagy during the fasting window | Mitophagy induction; glycation rate reduction from lower overnight glucose exposure | Moderate: protocols and populations vary |
The Five Places the Energy System Breaks Down
The decline does not happen at one point. It compounds across five simultaneous processes. Men in their 40s skincare routines tend to address what they can see while leaving these upstream mechanisms running unchecked.
Mitochondrial DNA sits unprotected inside the mitochondria, without the histone proteins that shield nuclear DNA. Every time the electron transport chain runs, it produces reactive oxygen species as a byproduct. Those byproducts damage the DNA guiding the very process that created them. Over time, this accumulates as mutations and deletions that reduce how efficiently the chain can produce ATP. A 2025 study confirmed significantly lower mitochondrial DNA content in aged skin versus young skin, with measurable reductions in cellular respiratory capacity as a direct consequence.[2]
NAD+ is the electron carrier that makes ATP synthesis possible inside the mitochondria. Without enough of it, the electron transport chain slows down and produces less energy per unit of oxygen consumed. An enzyme called CD38 increases in activity with age and destroys NAD+ as part of immune signaling, compounding the supply problem. Skin cells operating in a relatively low-oxygen environment register this deficit early, before systemic symptoms appear elsewhere in the body.[10,11]
Mitophagy is the cellular program that identifies and removes damaged mitochondria so functional replacements can be built. When it falls behind, broken mitochondria stack up inside the cell. Through shared calcium signaling and oxidative stress spillover, they suppress the output of the healthy mitochondria still functioning around them. A cell full of degraded mitochondria produces less total ATP than a cell with fewer, cleaner, fully functional ones. This is the mechanism most energy protocols skip entirely.[7,8]
Each cell produces its own ATP locally from available oxygen and substrates. When overall metabolic efficiency declines, the body maintains preferential blood flow and oxygen delivery to high-demand organs: heart, brain, liver, and kidneys. Skin, as a lower-priority tissue in that delivery hierarchy, operates on reduced oxygen supply during periods of metabolic stress, which limits how much ATP its cells can generate. Men who notice persistent dullness or skin not responding to products may be observing one consequence of this: skin cells operating below their energy production potential.[2,11]
Retinoids activate nuclear receptors that drive gene expression for collagen production. Peptides signal fibroblasts through surface receptors. Growth factors bind to membrane targets and trigger repair cascades. Many steps in these responses, from receptor activation to protein synthesis to secretion, require ATP to execute. A skin cell with reduced mitochondrial output has less capacity to complete those responses. Cellular energy status is one significant factor influencing what a product stack can accomplish, alongside barrier integrity, delivery system, and formulation quality.[1,3]
What You Cannot Measure Yet
Mitochondrial function in skin cells is not available as a consumer test. You can track glucose, HRV, sleep staging, and a wearable VO2 estimate. You cannot measure ATP output in your dermal fibroblasts without laboratory equipment. This leaves the most important variable in skin aging biology as a blind spot in any self-tracking routine.
| What to Measure | Current Consumer Access | Reliability |
|---|---|---|
| ATP output in skin cells directly | Research-only. Requires Seahorse XF analyzer or fluorescence imaging. No consumer equivalent exists. | Unavailable to consumers |
| NAD+ blood levels | Mail-in blood tests available, approximately $150 to $300 per test from several suppliers. | Moderate: blood NAD+ does not perfectly mirror intracellular skin cell NAD+ |
| Mitophagy activity | Research-only. Requires flow cytometry and fluorescent probes in a laboratory. | Unavailable to consumers |
| Collagen density (practical proxy) | High-frequency ultrasound in clinical dermatology. $200 to $500 per session depending on location. | High: validated outcome measure used in published photobiomodulation RCTs |
| LED device irradiance | Manufacturer-reported only. Independent third-party testing is rare for consumer devices. | Low: Most LED face masks men find at consumer price points vary in actual delivered dose |
| Systemic mitochondrial capacity via VO2 max | Wearable estimate available; lab-grade CPET test for precision measurement. | Moderate from wearables, high from standardized lab protocol |
Four Things the Research Flags
Photobiomodulation follows a biphasic dose-response curve. Below approximately 4 joules per square centimeter, there is minimal measurable cellular effect. Many LED face mask men purchase at consumer price points operate at irradiance under 5 milliwatts per square centimeter, which requires session durations far beyond practical use to reach therapeutic dose. Specifications are self-reported by manufacturers and rarely independently verified. The gap between a clinical-grade device and an underpowered consumer mask can be a tenfold difference in actual energy delivered to dermal tissue.[4,12]
Third-party testing of NMN and NR products regularly finds labeling inaccuracies, with some products delivering a fraction of the stated dose. Human trials showing mitochondrial benefit used specific doses and formulations that many commercial products do not match. The supplement market for NAD+ precursors is large and largely unregulated for quality. Sourcing from manufacturers with an independent certificate of analysis reduces this risk substantially.[10]
Reactive oxygen species generated during exercise act as signaling molecules that trigger mitophagy, mitochondrial biogenesis, and insulin sensitivity adaptations. High-dose antioxidant supplementation neutralizes these same ROS, blunting the adaptive signals before they can complete. Ristow and colleagues documented in a controlled trial that high-dose vitamin C and E prevented exercise-induced improvements in insulin sensitivity by suppressing the oxidative stress signals that carry the adaptation message.[13]
Photobiomodulation raises ATP in skin cells locally. It does not address the body-wide drivers of mitochondrial decline: chronic sleep debt reduces NAD+ recovery, sedentary behavior eliminates the PGC-1alpha stimulus for new mitochondria, high glycemic load accelerates mtDNA damage, and chronic inflammation suppresses mitophagy. A targeted skin protocol running on top of unaddressed systemic drivers produces real but limited results. The combination of both approaches is where the compounding happens.[9,11]
Three Ways to Actually Rebuild Cellular Energy Output
The approach has a specific sequence. Clear first. Build second. Target the skin directly third.
Step one: clear the wreckage. Urolithin A is a compound produced when gut bacteria metabolize ellagitannins found in pomegranates. It activates the PINK1-Parkin pathway, the cellular tagging system that marks damaged mitochondria for removal and replacement. This is the clearance step. Most energy protocols skip it and go straight to stimulation, which is like trying to drive faster with a clogged engine. The 2024 systematic review by Kuerec and colleagues confirmed that urolithin A activates this clearance pathway measurably in humans, a distinction that most compounds with mitophagy effects in cell studies cannot claim.[7,8]
Step two: signal for new mitochondria. PGC-1 alpha is the master switch that turns on the genes for building new mitochondria. Exercise is the most reliable activator, specifically the metabolic stress generated by higher-intensity training. The Storoschuk 2025 review challenged the Zone 2 training consensus for non-athletes, showing that higher-intensity intervals activate PGC-1 alpha more reliably than low-intensity steady-state work. Cold exposure and overnight fasting also activate the signal. Two to three high-intensity sessions per week alongside consistent strength training delivers the growth stimulus.[9]
Step three: target the skin directly. Exercise and nutrition improve mitochondrial function throughout the body. Light reaches the mitochondria in skin cells specifically. Red light at 630nm and near-infrared at 850nm are absorbed by cytochrome c oxidase in the electron transport chain of skin cell mitochondria. The absorption restores electron flow and raises ATP output in the fibroblasts and keratinocytes directly under the device. This is the only external intervention that delivers an energy stimulus to the mitochondria in your face. No amount of training sends that signal to your forehead.[3,4,5,6]
GOA's Anti-Aging LED Exosystem pairs the Exomask, delivering calibrated 630nm and 850nm light through 288 light nodes over 15-minute sessions, with the Anti-Aging Face Set. The AAFS uses microencapsulation to protect retinoid complex, peptides, and antioxidant systems during the session and release them progressively into skin that is running on elevated ATP in the hours after. The sequence is specific: the Exomask Purifying Cleanser first removes surface debris that scatters photons, then the light session raises cellular energy, then the active stack goes into tissue that has the power to run it.
Protocol
Clear the surface before any photon delivery
Cleanse with a gentle, non-stripping formula to remove sebum, sunscreen residue, and product buildup. Sebum and surface debris scatter incoming photons and reduce the effective irradiance reaching dermal tissue. Pat dry before the session. This step takes 60 seconds and changes how much of the light session actually does anything.
Actives on clean skin before the light session
Apply the AAFS serum layer to clean skin before placing the Exomask. Microencapsulated retinoid complex, peptides, and hyaluronic acid sit at the skin surface during the session and release into the elevated-ATP window that follows. The key to how to boost collagen men actually get from a retinoid is having a skin cell with enough energy to run the collagen gene expression those actives are designed to trigger.[1,5]
15 minutes. 630nm and 850nm. 288 calibrated light nodes.
Position the Exomask and run the session for 15 minutes. The light targets cytochrome c oxidase in the mitochondria of fibroblasts and keratinocytes across the full face. Three to five sessions per week reflects the frequency used in published trials showing collagen density gains over 8 to 12 weeks of consistent use.[5,6,12]
Moisturize post-session. SPF for any daytime protocol.
Apply moisturizer after the session to support barrier function and reduce transepidermal water loss. Daytime protocols add SPF 30 or higher before any sun exposure. UV radiation directly damages mitochondrial DNA in skin cells and drives the oxidative stress that compounds the energy deficit over time. Protecting against UV is protecting the mitochondria.[2]
High-intensity training, sleep, fasting, and NAD+ inputs alongside the local protocol
The Exomask addresses skin cell mitochondria. The systemic drivers of mitochondrial decline require systemic inputs. Two to three high-intensity sessions per week for PGC-1 alpha activation. Seven to eight hours of sleep for NAD+ recovery and mitophagy support. A 12 to 16-hour overnight fast to stimulate mitophagy. Men over 40 skin outcomes compound when the local photobiomodulation protocol runs alongside these inputs rather than in isolation from them.[8,9,11]
Frequently Asked Questions
Why does my skin look tired even when I'm sleeping enough?
Skin fatigue, dullness, puffiness, slow surface recovery, often reflects reduced cellular energy production rather than sleep debt. When mitochondrial ATP output has declined, skin cells lack the fuel to maintain collagen production, barrier repair, and the clearance of inflammatory byproducts at the rate needed to keep the surface looking rested. Sleep supports NAD+ recovery and systemic mitochondrial repair, but it does not directly restore mitochondrial function in skin cells at a rate that reverses years of energy decline. Photobiomodulation addresses the mitochondria in skin cells specifically, which sleep cannot do.[1,2,4]
Why is my skin not responding to products it used to work with?
Products can stop performing for several reasons: barrier sensitization, skin adaptation to an active over time, formulation mismatch, or reduced cellular energy capacity. The energy explanation is specific: most active ingredients trigger biochemical cascades that require ATP at multiple steps. Retinoids activate nuclear receptors for collagen gene expression. Peptides signal fibroblasts. Growth factors bind to membrane targets and trigger repair pathways. When mitochondrial output has declined, the skin cell may have less capacity to complete those responses fully. Improving cellular energy through photobiomodulation is one documented way to increase the cell's ability to act on the signals those ingredients provide.[1,3,4]
Is red light therapy for men actually supported by clinical evidence?
The evidence base is substantial across independently conducted sham-controlled trials. Wunsch and Matuschka documented significant collagen density gains and skin roughness improvements in a 113-subject randomized controlled trial. Lee and colleagues documented wrinkle depth reductions up to 36 percent and elasticity gains up to 19 percent in a split-face design. A 2025 multi-center sham-controlled study on home-use devices confirmed crow's foot improvements over 12 weeks. The mechanism, cytochrome c oxidase absorption at red and near-infrared wavelengths, drives the proton gradient enabling ATP production, and is documented independently of the clinical trials in biophysics literature. Device dose matters: LED face mask men find at consumer price points often deliver irradiance far below the therapeutic threshold these trials used.[3,4,5,6,12]
Does fixing mitochondria in the rest of the body help skin specifically?
Systemic mitochondrial improvements increase overall metabolic efficiency and support better oxygen delivery across all tissues. Because skin receives lower-priority oxygen supply under metabolic stress, improving the body's overall mitochondrial function can meaningfully support the skin's own ATP production capacity. Photobiomodulation adds a local stimulus on top of that systemic baseline, activating cytochrome c oxidase specifically in facial skin cell mitochondria through direct photon absorption. Each approach works through a different mechanism, and the results compound when both run together. Systemic inputs support the metabolic environment. The light session targets the specific tissue where the visible outcome is measured.[2,7,9,11]
References
- Vidali S, Knuever J, Lerche AD, et al. Ageing is associated with a reduction in markers of mitochondrial energy metabolism in the human epidermis. Experimental Dermatology. 2023;32(3):e14778.
- Zhang M, et al. Aging-Associated Mitochondrial Decline Accelerates Skin Aging and Obesity. Journal of Investigative Dermatology. 2025.
- Karu TI. Mitochondrial signaling in mammalian cells activated by red and near-IR radiation. Photochemistry and Photobiology. 2008;84(5):1091–1099.
- Hamblin MR. Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. AIMS Biophysics. 2017;4(3):337–361.
- Wunsch A, Matuschka K. A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, reduction of fine lines, wrinkles, skin roughness, and intradermal collagen density increase. Photomedicine and Laser Surgery. 2014;32(2):93–100.
- Lee SY, Park KH, Choi JW, et al. A prospective, randomized, placebo-controlled, double-blinded, and split-face clinical study on LED phototherapy for skin rejuvenation. Journal of Photochemistry and Photobiology B. 2007;88(1):51–67.
- Ryu D, Mouchiroud L, Andreux PA, et al. Urolithin A induces mitophagy and prolongs lifespan in C. elegans and increases muscle function in rodents. Nature Medicine. 2016;22(8):879–888.
- Kuerec AH, Lim XK, Khoo AL, et al. Targeting aging with urolithin A in humans: a systematic review. Ageing Research Reviews. 2024;100:102406.
- Storoschuk KL, Moran-MacDonald A, Gibala MJ, Gurd BJ. Much ado about Zone 2: A narrative review assessing the efficacy of Zone 2 training for improving mitochondrial capacity in the general population. Sports Medicine. 2025.
- Yusri K, Jose S, Vermeulen KS, Tan TCM, Sorrentino V. The role of NAD+ metabolism and its modulation of mitochondria in aging and disease. npj Metabolic Health and Disease. 2025.
- Lopez-Otin C, Blasco MA, Partridge L, Serrano M, Kroemer G. Hallmarks of aging: An expanding universe. Cell. 2023;186(2):243–278.
- Park SH, Park SO, Jung JA. Clinical study to evaluate the efficacy and safety of home-used LED and IRED mask for crow's feet: a multi-center, randomized, double-blind, sham-controlled study. Medicine. 2025;104(7):e41596.
- Ristow M, Zarse K, Oberbach A, et al. Antioxidants prevent health-promoting effects of physical exercise in humans. Proceedings of the National Academy of Sciences. 2009;106(21):8665–8670.
