Trusted anti-aging guides backed by dermatological research
Browse our science articles and guides.
56 articles · Page 1 of 2
Metformin is called a longevity drug, but a 21-year trial found no survival benefit in people without diabetes. The mouse data, TAME trial, exercise trade-off and risks.
'Cortisol face' is a social media term, not a diagnosis. How stress actually affects skin, common causes of a puffy face, and the warning signs of Cushing's syndrome.
Methylene blue anti-aging serums are based on lab and 3D skin-model studies, not human trials. What the research shows, oral methylene blue risks, and safer actives.
The science behind gender differences in collagen loss, why menopause accelerates the gap, and evidence-based strategies for women to protect and rebuild collagen.
Explore the science behind how air pollution, urban particulate matter, and city living accelerate skin aging compared to rural environments, and learn protective strategies for urban dwellers.
Advanced glycation end products (AGEs) cross-link collagen and build up with age, sun and high blood sugar. What the science shows and what you can do.
mTOR is the cell's growth switch. Why turning it down extends lifespan in lab animals, how diet and rapamycin affect it, and what it means for skin.
How skin aging differs across ethnicities and Fitzpatrick skin types: pigmentation, wrinkles, volume loss and treatment safety, with tailored routines.
The overlooked connection between endometriosis and skin health, including how chronic inflammation, hormonal treatments, and pain affect skin aging in women.
During deep sleep (NREM stage 3): growth hormone peaks → stimulates cell turnover and collagen synthesis. Cortisol drops to daily minimum → reduces inflamm...
How age-related bone density loss in the skull reshapes the face, and what you can do to slow skeletal aging and preserve facial structure.
A comprehensive guide to antioxidants for anti-aging — understand the free radical theory of aging, discover the most effective antioxidants for skin, and learn how to use them topically and through diet.
The surprising connection between dental health and facial aging, including how tooth loss, gum disease, and jaw bone changes reshape the face over time.
Understanding the science of collagen loss after 60 and evidence-based strategies to slow degradation and support collagen rebuilding in aging skin.
The skin aging exposome is every outside and lifestyle factor that ages skin: sun, pollution, smoking, diet, sleep and stress. What the research shows and what protects you.
Rapamycin extends lifespan in mice and a small trial of topical rapamycin lowered skin aging markers. What's known, what's not, and the safety concerns.
The skin barrier consists of multiple defense layers: 1) The acid mantle (pH 4.5-5.5 film of sweat, sebum, and fatty acids that inhibits pathogenic bacteri...
Oxidative stress occurs when free radical production exceeds your body's antioxidant defenses, creating a state of imbalance that damages cellular componen...
Understanding why wounds heal more slowly in aging skin and evidence-based strategies to support faster, safer recovery in older adults.
How different forms of hormonal contraception impact skin health, acne, aging, and pigmentation—and what to expect when you start or stop birth control.
A scientific look at how your skin transforms each decade, from collagen changes to hormonal shifts, and what you can do about it.
Your skin hosts bacteria, fungi and viruses that shift with age. What the research shows about the microbiome and skin aging, and what's still marketing.
How thyroid disorders accelerate skin aging in women, from dryness and thinning to slow wound healing, and strategies for managing thyroid-related skin changes.
The acid mantle is a thin film of sweat, sebum, and fatty acids on the skin surface with a pH of 4.5-5.5. This slightly acidic environment inhibits harmful...
Stem cell skincare is mostly marketing. Plant stem cell extracts (apple, grape, edelweiss) contain antioxidants but cannot function as stem cells in human ...
How estrogen regulates collagen production, skin thickness, and elasticity—and what happens to your skin when levels decline during menopause.
Up to 80% of visible facial aging has been attributed to sun exposure. How photoaging differs from chronological aging, how to tell them apart, and what reverses each.
Collagen gets name-dropped in every anti-aging product, but few people understand what it actually does, why it breaks down, or which interventions genuine...
The science behind why men and women age differently, from skin structure to hormonal influences, and what it means for your anti-aging strategy.
Explore the biological mechanisms driving skin aging — from collagen breakdown and free radical damage to telomere shortening and hormonal shifts — and learn what science says about slowing the process.
The dermal matrix of collagen, elastin and hyaluronic acid holds skin up. How fragmented collagen creates a vicious cycle in aged skin, and which treatments rebuild it.
Explore the science behind testosterone's impact on skin aging, from collagen production to oil regulation and how hormonal changes affect male skin over time.
Telomeres—the protective caps on your chromosomes—have become the poster child of aging biology. Shorter telomeres correlate with biological aging, disease...
Your skin hosts 1,000+ bacterial species, fungi, viruses, and mites forming a complex ecosystem called the microbiome. Healthy microbiome diversity protect...
NAD+ levels fall with age in animal and human tissue. What NAD+ does, what human trials of NR and nicotinamide actually found, and what it means for your skin.
Estrogen supports collagen, hydration and skin thickness. What happens to skin after menopause, what hormone therapy trials found, and the best skincare steps.
Estrogen decline at menopause triggers: 30% collagen loss in the first 5 post-menopausal years (2% annually thereafter), 50% reduction in sebum production ...
Collagen provides tensile strength—resistance to stretching and structural support (like steel cables in a bridge). Elastin provides elastic recoil—the abi...
The science of skin aging: intrinsic (genetic, hormonal) versus extrinsic factors like sun, pollution, smoking, diet and sleep, and which ones you can control.
Your face contains distinct fat compartments (superficial and deep) that provide youthful fullness and contour. With aging, these fat pads atrophy (shrink)...
Growth factors (EGF, TGF-beta, FGF, PDGF) are cell-signaling proteins that regulate growth, proliferation, and differentiation. In skincare, they're derive...
Skin cells run on a body clock that times cell division and DNA repair. What the research shows, how sleep affects skin, and whether night creams matter.
How retinol works in skin, from conversion to retinoic acid to collagen and cell turnover. What it does for fine lines, deep wrinkles, pores and dark spots, and how long it takes.
Chemical (organic) sunscreens contain molecules that absorb UV photons, converting the energy to heat that dissipates harmlessly. Different molecules absor...
Sirtuins are NAD+-dependent enzymes linked to aging in lab research. What they do in skin, why resveratrol didn't raise SIRT1 in human trials, and what the evidence supports.
Elastin fibers give skin its snap-back. How sun and time damage them (solar elastosis), why elastin barely regenerates, and which treatments have evidence.
UV light damages mitochondrial DNA in skin, creating a marker called the common deletion linked to photoaging. What the research shows and what helps.
UV light causes DNA lesions that skin must constantly repair. What xeroderma pigmentosum teaches about aging, and the evidence for DNA repair enzymes and nicotinamide.