Figuring out your skin shouldn't be this hard.
Scan a product. Know in seconds.
Free to start · Not medical advice
Stop guessing. Start knowing.
Patch works in three simple steps.
My allergens
5 active
Methylisothiazolinone
MI / MCI
Fragrance (parfum)
Mixed
Cocamidopropyl betaine
Surfactant
Formaldehyde releasers
Preservative
Limonene
Fragrance
Build your profile
Add your patch-test confirmed or self-reported allergens once. Patch quietly filters every label you scan against this list — no second-guessing required.
- Allergens, aliases, and known cross-reactors all linked
- Suggestions from products you've reacted to
- Editable anytime, kept private to your account
Scan any product
Point your camera at a barcode or ingredient label. In under three seconds, every ingredient is graded Avoid, Watch, or Safe — color-coded for your eyes only.
- At-a-glance verdict bar before you read a thing
- Tap any ingredient for plain-English reasoning
- Save safe products to your shelf in one tap
Gentle Body Wash
28 ingredients found
At a glance
1
Avoid
25
Not flagged
1
Seen before
1
Common sensitizer
Body wash · under $20
3 picks for you
Filtered for your allergens
Vanicream
Gentle Body Wash
La Roche-Posay
Toleriane Cleanser
Avène
Skin Recovery Cream
Shop with confidence
Generate a curated shopping list for any category — moisturizer, shampoo, lipstick, laundry detergent. Every product is pre-screened against your profile, with verified prices and direct buy links.
- Budget-aware picks with real-time pricing
- Direct buy links — no dead pages, no guessing
- Mark "I own this" to build your safe-product shelf
The old way vs. the Patch way
Why shopping for sensitive skin used to be a gamble — and how we fixed it.
The Drugstore Gamble
Standing in the aisle, squinting at micro-print ingredient labels, trying to decode 30-letter chemical aliases.
You scan the ingredients
You look at 'Aqua, Glycerin, Methylisothiazolinone...' and try to remember your safe list.
Nothing looks familiar
Is that compound related to your formaldehyde allergy? You search Google, getting conflicting answers.
You guess
It says 'hypoallergenic' and 'dermatologist tested' on the front. It must be fine, right?
You flare up
Two days later, the itchy red rash returns. Another bottle wasted, another week on topical steroids.
The 3-Second Check
Instantly filtering out cosmetics containing your specific medical allergens. No guesswork, no complex research.
You scan the barcode
Just point your camera or search the product name on your phone.
Green
Patch cross-references the label with your personalized allergen list in real-time.
You buy it
Walk to the register with 100% confidence. No risk of mystery dermatitis flare-ups.
You repurchase — and share
Buy with peace of mind again and again, and send Patch to your skin-sensitive friends.
Frequently Asked Questions
Answers to common questions about allergens, databases, and how Patch protects your skin.
Yes! Since Patch parses standard INCI (International Nomenclature of Cosmetic Ingredients) names, it works on shampoo, conditioner, hair dye, body wash, hand soap, dish soap, laundry detergents, and other household cleaners that list their chemical ingredients. If it has an ingredient label, Patch can screen it.
No. Patch is strictly an informational tool built from public ingredient registries and academic allergen databases. It is not a substitute for a professional patch test, medical diagnosis, or consultation with a dermatologist. Always consult with your doctor regarding specific medical concerns or severe symptoms.
Simply register a free account. You can select your dermatologist-confirmed allergens from our pre-compiled common allergy families (like Fragrance Mix, Lanolin, or Nickel) or add personal keyword alerts. Once added, Patch will automatically screen every product label against your list.
That is where Patch shines. If a product isn't already cataloged, you don't need to wait. You can simply copy-paste its ingredient list or snap a clear photo of the ingredient label on a bottle. Our system will analyze the ingredients on the fly and filter them against your allergens.
Yes. We believe your medical and skin health data is yours alone. We do not sell your personal data or share your allergen profile with third-party marketers or advertisers. Your profile is securely stored and used only to filter products for your own screen.