Learn about allergens.
Evidence-based guides on cosmetic ingredients that cause reactions: what they are, what to look for on labels, and how to find safer alternatives.
high riskAfter Your Patch Test: A Complete Shopping Guide
You got your patch test results. Now what? How to turn clinical allergen data into safe, everyday product choices.
mediumAyurvedic Skincare Safety: What Western Science Says
Turmeric, neem, ashwagandha, and other traditional ingredients are trending in Western skincare. Here is what…
highBaby Skincare: The Allergen Field Guide for Parents
"Gentle," "natural," and "pediatrician-tested" are marketing. Your baby's skin barrier is still under construc…
highBest Skincare Allergen Checker (2026): What Actually Matters
Why personalised, patch-test–aware checking beats generic "clean" scores for contact dermatitis — and how the…
mediumCoconut in Skincare: The Derivative Maze
Coconut hides in an estimated 70% of cosmetics under names that look nothing like "coconut." Here is the full…
highContact Dermatitis: The Complete Guide
What causes skin reactions from cosmetics, how to identify triggers, and when to see a doctor
highSkincare Guide for Eczema-Prone Skin
How to build a safe skincare routine when you have eczema or atopic dermatitis
highEssential Oils in Skincare: Hidden Risks
Why "natural" essential oils can cause allergic reactions and skin sensitization
highWhy Are My Eyelids Red? The Makeup & Skincare Culprits
Eyelid skin is the thinnest on your body — which makes it the first place a cosmetic allergy shows up, often f…
highFood Allergens in Skincare: The Cross-Reactivity Guide
If you are allergic to nuts, wheat, soy, or other foods, your cosmetics might contain the same proteins under…
highHidden Formaldehyde in Your Cosmetics
How to identify “formaldehyde releasers” (and why heat can make them worse)
highFragrance Allergies in Cosmetics
Understanding parfum, “fragrance-free” claims, and common fragrance allergens
mediumThe "Hypoallergenic" Myth
Why "hypoallergenic" labels don't guarantee safety and what to look for instead
mediumINCIDecoder Alternative for Contact Allergies
When you need INCI lists plus a personalised verdict against your patch-test results — not just generic ingred…
mediumMilk, Honey & Egg in Cosmetics: Animal-Derived Food Allergens
The "kitchen beauty" trend put breakfast in your skincare. For the food-allergic, that is not a metaphor.
mediumThe Natural Ingredients Myth: Why “Natural” Doesn’t Mean Safe
Essential oils and botanicals can be powerful allergens (and some are phototoxic)
highNickel in Makeup: The Hidden Metal on Your Face
The world's most common contact allergen is not listed on a single cosmetic label — because it arrives as a co…
mediumAlmond, Shea, Argan: When Nut Allergies Meet Face Oils
Nut and seed oils are skincare darlings — and a minefield of Latin names for anyone with a nut or seed allergy…
mediumOat (Avena Sativa) in Skincare: Soothing Hero or Hidden Trigger?
Colloidal oatmeal is the backbone of eczema skincare — and a real allergen for a small but growing group. Here…
lowUnderstanding Parabens: Facts vs Fear
What parabens do, what the science actually says, and how to choose alternatives
highCross-Reactors: The Hidden Allergens You Also Need to Avoid
Why one positive patch test often means avoiding a whole family of chemicals — and how to spot the cousins on…
highPatch Test Panels Explained: T.R.U.E. Test vs Comprehensive Series
What was actually tested on your back? A guide to baseline panels, extended series, and what to do when your p…
highHow to Prepare for Your Patch Test
A pre-appointment guide: what to stop using, what to bring, and how to set yourself up for accurate results
highI Got My Patch Test Results — Now What?
A short guide to reading your results and turning them into safer product choices
highPPD Allergy: Hair Color Survival Guide
Tested positive for paraphenylenediamine? Here are your real hair color options — and the dyes to never touch…
highPreservative Sensitivity: MI, MCI & “Kathon CG”
The preservatives behind many “mystery rashes” — and how to spot them on labels
mediumHow to Read Cosmetic Ingredient Labels
Decode INCI names, understand ingredient order, and spot hidden allergens on product packaging
mediumRosacea-Safe Skincare: The Trigger Ingredients to Avoid
Rosacea skin overreacts by design. Here are the ingredients most likely to set it off — and how to build a rou…
mediumSkinsort Alternative for Real Allergen Safety
Category scores help you browse; contact-allergy patients need each INCI name checked against their own patch-…
highWhy Am I Still Reacting After My Patch Test?
Eight reasons your skin keeps flaring even after a diagnosis — and the systematic way to find what's really tr…
mediumSulfate Sensitivity: SLS & SLES Explained
Why they feel “extra clean”, and when they become too harsh
mediumSunscreen Sensitivity: Finding Sun Protection That Doesn't Irritate
Chemical vs mineral sunscreens, common irritants in SPF products, and how to find one that works for sensitive…
Ingredient encyclopedia
Deep dives into individual cosmetic ingredients: what they are, why they cause reactions, names to watch on labels, and safer alternatives.
Ready to check your products?
Browse the skincare catalog with full INCI lists, or try the free label scanner.