The Lab
No BS skincare science
ingredientsSqualane oil: what it is and the real skin benefits in 2026
Squalane is a stable, lightweight biomimetic oil that mimics skin lipids. Here is what it actually does, who it suits, how to use it, and what to avoid.
November 2, 2026
ingredientsCopper peptides (GHK-Cu): the anti-aging promise and the actual evidence in 2026
Copper peptides and GHK-Cu reviewed: the real anti-aging evidence, how they compare to retinol, concentrations that work, pH, and formulation traps to avoid.
October 31, 2026
ingredientsMandelic acid: the gentle AHA that works on sensitive and acne-prone skin in 2026
Mandelic acid, the almond-derived AHA: chemistry, clinical evidence on acne and pigmentation, and why it suits reactive or melanin-rich skin.
October 28, 2026
ingredientsLactic acid vs glycolic acid: which AHA actually suits sensitive skin in 2026
A dermato-cosmetic comparison of the two best-known AHAs. Molecule size, pH, clinical evidence and the one that reactive skin tolerates best.
October 25, 2026
ingredientsSnail mucin skincare: what the science actually shows in 2026
A dermato-cosmetic review of snail secretion filtrate: what it is, what the clinical data supports, and when it beats hyaluronic acid or peptides.
October 23, 2026
ingredientsBeta-glucan vs hyaluronic acid: the gentler hydrator
Compare topical beta-glucan and hyaluronic acid on hydration, soothing and evidence, so reactive or barrier-impaired skin picks the right humectant.
October 20, 2026
ingredientsPolyglutamic acid vs hyaluronic acid: what the evidence shows
Compare the evidence for topical hyaluronic acid and polyglutamic acid, understand study limits, and avoid unsupported hydration claims.
October 9, 2026
guidesCruelty-free skincare in 2026: checking claims, scope and certification
Understand EU animal-testing rules, the published Leaping Bunny standard and how to check a cruelty-free claim without assuming vegan or proven performance.
October 8, 2026
guidesSkincare brand transparency: what you can actually verify in 2026
Check skincare ingredient lists, concentration claims and study details without mistaking a transparency checklist for a safety or efficacy score.
October 7, 2026
product-reviewsWorst rated skincare brands 2026: avoid these 5 viral launches
The 5 lowest rated viral skincare launches of 2026, from fake stem cell serums to peptide lip balms, with the dermato cosmetic reasoning behind each flop.
October 6, 2026
product-reviewsSplurge vs save 2026: 7 luxury skincare dupes that match the original
Seven honest luxury skincare dupes for 2026 compared ingredient by ingredient against the splurge version, with the dermato cosmetic reasoning behind each pick.
October 5, 2026
product-reviewsTop 5 affordable retinols 2026: under $25 picks dermatologists rate
Affordable retinols under $25 ranked for 2026: five dermatologist friendly picks compared on concentration, delivery, formula and real tolerance.
October 4, 2026
ingredientsPeptide stacking 2026: does layering 4 peptides do anything?
Peptide stacking in 2026: peptide categories, limits of layering research and questions to ask before combining four products in a skincare routine.
October 2, 2026
ingredientsExosomes in skincare 2026: the hype, the science, the legal mess
Exosomes in skincare in 2026: what they are, the limits of clinical evidence, regulatory questions and what to check before buying a serum.
October 1, 2026
routinesCeramide flooding 2026: what the new TikTok layering trick really does
Ceramide flooding in 2026: what the TikTok layering trend claims, what barrier research can support, and the limits to consider before adding more products.
September 30, 2026
routinesSlugging with vaseline 2026: a derm review of the viral overnight trend
Slugging with petrolatum in 2026: evidence, limits and practical questions to consider before adding an occlusive layer to a skincare routine.
September 29, 2026
scienceDerm-tested skincare: what that label actually means in 2026
Derm-tested has no standard legal definition in the US or EU. What regulators require, what a real dermatology study looks like and how to judge the claim.
September 20, 2026
guidesPatch testing skincare: the dermatologist protocol for 2026
Patch test a new skincare product the way dermatologists advise: where to apply it, reading at 24, 48 and 72 hours, irritation vs allergy and when to stop.
September 13, 2026
guidesHow to decode an INCI list 2026: pro tips for spotting filler
Decode any INCI list in minutes: ingredient order, the 1 percent line, filler ingredients, real active concentrations and what changed on labels in 2026.
September 11, 2026
scienceEU vs US Cosmetic Regulation: Key Differences in 2026
Compare EU and US cosmetic rules, including ingredient restrictions, MoCRA, safety responsibilities and why sunscreen regulation differs.
September 10, 2026
Sponsored contentOxmani ingrown hair serum review 2026: does it really work?
Advertiser-supplied Oxmani ingrown hair serum review covering ingredients, use and customer feedback. Sponsored content.
September 10, 2026
scienceEWG Skin Deep Ratings Explained: Hazard vs Risk
Understand EWG Skin Deep ratings, their hazard-based method, data gaps and why a product score is not the same as a real-world risk assessment.
September 9, 2026
scienceAre Parabens Safe? What the Evidence Says in 2026
Review what toxicology studies and SCCS opinions say about paraben safety, exposure limits and the claims found on paraben-free cosmetics.
September 7, 2026
scienceFragrance-Free vs Unscented: What Is the Difference?
Fragrance-free and unscented do not mean the same thing. Learn how masking fragrance works and what sensitive skin should check on an INCI list.
September 6, 2026
scienceNatural Skincare: Why the Word Is Misleading and Often Meaningless
What natural means on a skincare label, why plant origin alone cannot establish safety, and how to examine evidence for a finished formula.
September 4, 2026
scienceClean Beauty Marketing Scam: What Brands Won't Put on the Label
What clean beauty labels mean, how free-from claims differ from safety evidence, and how regulators assess cosmetic ingredients.
September 3, 2026
skin-typesMature skin barrier loss: lipids, hormones and 2026 evidence
How skin barrier changes with age and hormones: evidence on lipids, ceramides and estrogen, and questions for a calmer skincare routine.
September 2, 2026
skin-typesOily skin and sebum: what niacinamide and zinc can do
A careful look at oily skin, gentle cleansing, the limited niacinamide evidence, zinc and when acne needs professional medical care.
August 18, 2026
routinesSkin streaming 2026: TikTok's 4-step minimalist routine, tested
Skin streaming is TikTok's answer to skincare fatigue: a four-step minimalist routine assessed against dermatology guidance, with its benefits and limits.
August 17, 2026
skin-typesCombination skin: definition, signs and routine
Combination skin is more than an oily T-zone. Learn what skin measurements show, what can mimic it, and how to build the right routine.
August 16, 2026
skin-typesDry vs dehydrated skin: differences and care
Dry skin and low surface hydration can overlap. Learn what TEWL and corneometry measure, the limits of home checks, and how to build a gentle routine.
August 13, 2026
scienceSPF 30 vs SPF 50: the real protection difference
SPF 30 vs SPF 50 explained with real percentages, the 2 mg per cm2 dose problem, UVA versus UVB coverage and what dermatologists recommend for daily use.
August 12, 2026
routinesSunscreen reapplication 2026: reminders that work
Sunscreen reapplication explained: when the two-hour rule applies, what under-application studies found, and what reminder trials actually measured.
August 12, 2026
scienceEU vs US sunscreen filters: bemotrizinol update
Compare EU and US sunscreen rules after FDA authorization of bemotrizinol, including UVA labels, filter lists and practical buying checks.
August 9, 2026
routinesBest tinted SPF for hyperpigmentation: iron oxide
Why tinted SPF with iron oxides helps melasma and dark spots: visible-light protection, what the melasma trials show, and how to choose and apply it daily.
August 7, 2026
scienceChemical vs mineral sunscreen: facts and trade-offs
Compare organic and mineral sunscreen filters, current FDA rules, infant guidance and the label details that matter when choosing protection.
August 2, 2026
routinesAging skin routine: useful principles by decade
Build an aging-skin routine around sun protection, tolerance and changing skin needs without prescribing retinoid doses by birthday.
August 1, 2026
routinesEczema barrier care: ceramides, oats and evidence
A conservative eczema routine based on moisturizers, gentle washing and clinician-directed flare treatment, with context on ceramides and oatmeal.
July 31, 2026
routinesHyperpigmentation: hydroquinone, cysteamine and TXA
Compare hydroquinone, cysteamine, tranexamic acid and kojic acid without mixing topical, oral and procedural evidence or overstating small trials.
July 27, 2026
routinesRosacea skincare routine: evidence and cautions
Build a gentle rosacea skincare routine, understand phenotype-based care, common triggers and when prescription treatment needs a clinician.
July 26, 2026
product-reviewsPaula's Choice vs SkinCeuticals: serum comparison
A label-based Paula's Choice vs SkinCeuticals comparison of 2% BHA Liquid and C E Ferulic: disclosed actives, use cases, prices to check and evidence limits.
July 25, 2026
routinesAdult acne routine: evidence and pregnancy cautions
Build a cautious adult acne routine, choose one evidence-based active, understand pregnancy limits and know when painful or scarring acne needs care.
July 23, 2026
product-reviewsSunday Riley Good Genes dupes: 6 budget alternatives
Sunday Riley Good Genes dupes compared: 6 budget lactic acid serums that match the results, with prices, concentrations and peer-reviewed evidence.
July 22, 2026
product-reviewsDrunk Elephant vs Dr. Dennis Gross: which is worth it
Drunk Elephant vs Dr. Dennis Gross compared by formula, price and results: vitamin C, peptides, glycolic peel pads and honest buying picks.
July 17, 2026
product-reviewsCOSRX vs Beauty of Joseon: Which Brand Is Better?
COSRX wins on gentle actives and BHA, Beauty of Joseon on rice and ginseng essences and its mineral sunscreen. Formula, price and skin-type picks compared.
July 16, 2026
routinesMelasma skincare: evidence-based actives that fade pigment
Tranexamic acid, azelaic acid 15 to 20%, hydroquinone, vitamin C and iron oxide sunscreen: what the melasma trials show for each and a realistic routine.
July 15, 2026
product-reviewsThe Ordinary vs The Inkey List: which dupe brand wins 2026
The Ordinary wins on price per active and labelled strengths, The Inkey List on plain-English guidance. Most single actives under 15 EUR. Clear picks.
July 10, 2026
product-reviewsCetaphil vs Avène for Sensitive Skin: Which Wins?
Cetaphil wins for simple, budget cleansing and moisturizing; Avène for reactive, redness-prone and post-procedure skin. Product picks by concern.
July 10, 2026
product-reviewsTatcha vs SK-II: Is Luxury J-Beauty Worth $200 in 2026
SK-II runs on Pitera, Tatcha on Hadasei-3. Price per ml (about $1.00 vs $1.40 to $1.84), cost per year and what PubMed studies show on the shared ferment.
July 9, 2026
product-reviewsCeraVe vs La Roche-Posay: barrier brands head to head
CeraVe wins on ceramide barrier repair and value, La Roche-Posay on reactive, rosacea-prone skin. Product-by-product picks with peer-reviewed evidence.
July 3, 2026
ingredientsAzelaic Acid 10% vs 20%: Which Strength Is Better?
10%, 15% or 20% azelaic acid? What the trials tested, why Finacea 15% and Azelex 20% have different US uses, and when 20% may feel too strong for you.
July 2, 2026
ingredientsSalicylic acid vs glycolic acid: BHA or AHA in 2026
Salicylic acid is an oil-soluble BHA that clears pores; glycolic acid is a water-soluble AHA that smooths texture. Which suits you, and can you mix them?
June 30, 2026
ingredientsCeramides 1, 2 and 3: which ratio repairs your barrier
Ceramides 1, 2 and 3 do different jobs in your skin barrier, and the 3:1:1 ratio with cholesterol and fatty acids is the one with real evidence. Honest guide.
June 30, 2026
ingredientsPeptide categories: signal, carrier, enzyme, neuro
The four peptide families in skincare decoded: signal, carrier, neurotransmitter and enzyme-inhibiting, with the evidence behind Matrixyl and copper peptides.
June 29, 2026
ingredientsHyaluronic acid molecular weight: HMW vs LMW vs oligo
HMW vs LMW vs oligo hyaluronic acid: HMW sits on top to hold water, LMW slips deeper to plump, oligo stays near the surface. Evidence based guide.
June 29, 2026
ingredientsVitamin C: L-Ascorbic Acid vs Derivatives
L-ascorbic acid is the gold standard, but SAP, MAP, THD ascorbate and ethyl ascorbic acid all have their place. Evidence-based vitamin C comparison.
June 27, 2026
ingredientsNiacinamide overhyped? The truth dermatologists rarely tell you
Niacinamide is everywhere, but is it as life changing as the marketing says? Evidence-based review of what it does, at what dose, and when it disappoints.
June 26, 2026
ingredientsRetinol vs retinal: which one works better in 2026
Retinol vs retinal explained: retinal is one step closer to retinoic acid and works faster, while retinol is gentler and cheaper. Evidence-based comparison.
June 25, 2026
guidesHow to Read an INCI List: Decode Skincare in 5 Minutes
Learn how to read an INCI list fast: the descending-order rule, the 1% line, hero actives and the marketing tricks the ingredient list quietly hides.
June 23, 2026
routinesCicatrices d'acné : estompez les taches post-inflammatoires
The best products for acne scars and post-inflammatory marks: which actives fade them, what only a dermatologist can fix, and how long it really takes.
June 23, 2026
ingredientsPeptides in skincare: are they worth the hype?
What peptides actually do in skincare, the evidence behind Matrixyl and copper peptides, why most serums underdose them, and how to spot one worth buying.
June 18, 2026
routinesBest Eye Creams: Do You Even Need One? What Dermatologists Say
An evidence-based guide to eye creams: whether you need one, which ingredients may help dark circles, puffiness and fine lines, and how formulas compare.
June 17, 2026
guidesIs Drunk Elephant Worth the Price? An Honest Ingredient Review
An evidence-first Drunk Elephant review: the Suspicious 6 marketing, hero products that earn their price, the overpriced skips, and who should actually buy.
June 16, 2026
scienceMineral Oil in Skincare: Benefits, Safety and Myths
What mineral oil and petrolatum do in skincare, whether they are safe, the cancer and pore-clogging myths, and the cosmetic vs industrial grade split.
June 13, 2026
scienceAre parabens safe? What the science actually says
Parabens, preservatives, endocrine disruptors, the 2004 Darbre study, FDA and EU rulings, the short chain vs long chain split, and what to use instead.
June 12, 2026
ingredientsSilicones in skincare: are they safe? The dimethicone debate
What silicones actually do in skincare, whether dimethicone is safe, the pore-clogging myth, the D4/D5 environmental rules, and how to read a label.
June 11, 2026
ingredientsBakuchiol vs Retinol: Is the Natural Alternative as Effective?
Bakuchiol vs retinol, compared on real evidence. Efficacy, side effects, sun sensitivity, pregnancy and which one fits your skin, with peer-reviewed sources.
June 8, 2026
guidesCOSRX : Top produits K-beauty classés par efficacité
COSRX guide ranking the brand's best K-beauty products by formulation, from Snail 96 Mucin to the BHA liquid, plus dupes, routine stacks and honest skips.
June 6, 2026
guidesHada Labo Complete Guide: Japan's Best-Selling Skincare Ranked
Hada Labo guide ranking Japan's best-selling lines by formulation: Gokujyun, Shirojyun, Premium and more, plus how to layer them properly.
June 4, 2026
routinesBest Cleansers for Sensitive Skin: Gentle Formulas Ranked
Cleansers for sensitive skin compared by surfactant type, pH and soothing actives, with options for rosacea- and eczema-prone skin.
June 3, 2026
ingredientsAzelaic Acid: The Most Underrated Ingredient for Acne and Rosacea
Azelaic acid quietly outperforms most actives for acne, rosacea and dark spots. A guide to concentrations, products and what the evidence really shows.
June 3, 2026
ingredientsCeramides explained: why your skin barrier needs them
What ceramides actually do, the nine types in skincare, why the 3:1:1 ratio matters, and how to choose a barrier cream that works, with evidence.
June 1, 2026
skin-typesRosacea skincare routine: what to use and what to avoid
A dermato-cosmetic guide to building a rosacea skincare routine. The ingredients to avoid, the actives that actually calm flushing, and how to layer them.
June 1, 2026
routinesBest Serum for Hyperpigmentation: Actives Ranked by Evidence
The best serum for hyperpigmentation, ranked by evidence: vitamin C, azelaic and tranexamic acid, plus the exfoliator and sunscreen that keep spots fading.
May 29, 2026
routinesSlugging with Vaseline: what dermatologists actually think
A dermato-cosmetic review of slugging with petroleum jelly. What occlusion does to your barrier, who should try it, and how to do it without breakouts.
May 29, 2026
scienceSPF : 10 erreurs que vous faites avec la crème solaire
Ten stubborn SPF myths examined against published guidance, from base tans and SPF 100 to indoor exposure and chemical filters.
May 29, 2026
routinesSkin cycling: does this TikTok trend actually work?
An evidence-based review of skin cycling: what the four-night protocol may do for your barrier and how to adapt it to your skin.
May 28, 2026
scienceBest anti-aging ingredients ranked by clinical evidence
Sunscreen, tretinoin and vitamin C top our evidence-graded ranking; retinol and AHAs follow; stem cells and gold lack human data. Tiers and timelines.
May 27, 2026
scienceDouble cleansing: is it worth it? What the science says
Is double cleansing actually backed by science? A formulation-led guide to oil and water cleansers, who benefits, common mistakes, and what evidence shows.
May 27, 2026
ingredientsSérum Vitamine C : Formes, concentrations et efficacité
A dermato-cosmetic guide to vitamin C serums: which form to choose (L-ascorbic acid vs derivatives), ideal concentration, pH, and how to layer in your routine.
May 25, 2026
ingredientsSalicylic acid vs benzoyl peroxide: which is better for acne?
Salicylic acid or benzoyl peroxide? A dermato-cosmetic breakdown of how each ingredient works, which acne type it suits, and how to combine them safely.
May 24, 2026
routinesAcne Skincare Routine: Four Evidence-Based Steps
A practical acne skincare routine with evidence-based AM and PM steps, ingredient options by acne type, and products scored by SkinScore.
May 22, 2026
routinesK-beauty Routine Explained: What Science Actually Supports
Dermato-cosmetic deep dive into the K-beauty routine: 4 essential steps backed by science, 6 optional layers, and how to build your own.
May 21, 2026
guidesThe Ordinary Complete Guide: Every Product Ranked and Reviewed
The Ordinary guide ranking every major product by formulation, evidence and skin-type fit. Best buys, biggest skips, conflicts to avoid and a routine builder.
May 18, 2026
ingredientsAcide hyaluronique : 5 erreurs qui assèchent votre peau
Hyaluronic acid mistakes can dry out your skin instead of hydrating it. Learn the 5 most common errors, the science behind them, and how to fix your HA routine.
May 16, 2026
routinesBest Sunscreen for Oily Skin: No White Cast, No Grease
The best sunscreen for oily skin combines SPF 30 to 50, fluid texture, non-comedogenic filters and sebum control. Ingredient breakdown and application tips.
May 11, 2026
product-reviewsLa Mer vs CeraVe: the 350 EUR Question Answered by Science
La Mer vs CeraVe: formulation, ceramides vs Miracle Broth, per-gram cost, derm consensus, and the verdict on whether the 350 EUR is worth it.
May 10, 2026
scienceFragrance in Skincare: The Hidden Allergen in 60% of Products
Fragrance is the most common allergen in skincare. Which ingredients to avoid, how EU and US rules differ, and the best fragrance-free picks by category.
May 6, 2026
scienceNiacinamide and vitamin C together: the myth is debunked
Can you mix niacinamide and vitamin C? Modern dermatology says yes. The 1960s lab study behind the myth, peer-reviewed evidence, and how to layer both.
May 3, 2026
routinesSkincare Routine Order: Morning & Night Sequence That Works
A practical morning and night skincare order, with layering principles, active ingredient compatibility, and a step-by-step sequence.
April 24, 2026
safetyPregnancy-Safe Skincare: The Complete 2026 Ingredient Guide
Which skincare ingredients to avoid during pregnancy, which are safe to keep, and the evidence from ACOG, NHS, and SCCS behind each decision.
April 22, 2026
ingredientsComedogenic Ingredients: The Complete 2026 List With Ratings
Top 25 comedogenic ingredients ranked on the Fulton scale, plus the ingredients wrongly feared (mineral oil, dimethicone) and the INCI position rule.
April 22, 2026
routinesBest Moisturizers for Dry Skin: Formulas Ranked
Moisturizers for dry skin ranked by formulation, including ceramide creams, drugstore and luxury options, and the ingredients with supporting evidence.
April 21, 2026
product-reviewsCeraVe vs Cetaphil: Which Is Better for Your Skin?
CeraVe vs Cetaphil moisturizing cream: the checked US labels list ceramides vs niacinamide. Compare formula, dry or sensitive skin fit and unit price.
April 16, 2026
ingredientsRetinol for beginners: how to start without wrecking your skin
A science-backed guide to retinol. Which strength to pick, how to apply it, what to avoid, and why most people fail in the first month.
April 14, 2026
ingredientsIs niacinamide safe? What dermatology research actually says
Clinical evidence on niacinamide safety: 18 RCTs reviewed, adverse event rates, contraindications, pregnancy data, and concentration response curves.
April 12, 2026