SkincareSafety Guide

Skin

Understand your skin type, tone, and what your skin is doing.

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Start here

Skin typesThe main skin types and how they differ.Find your skin typeA practical identification guide.What different skin types look likeVisual differences between common skin types.

Common skin questions

Oily skinWhat oily skin means and how to read it.Skin type changesHow skin type can shift over time.Skin type and ageHow visible aging differs by skin type.
Not sure where to start?Use the skin-type guide before choosing routines or ingredients.

Concerns

Start from a skin problem or visible change.

View concern guides

Oil and acne

Why oily skin happensThe main drivers behind excess oil.Oily skin and acneHow oil can contribute to breakouts.Can oily skin cause acne?A direct answer to the oil-acne link.

Changes and warning signs

Stress and oily skinHow stress may affect oiliness.Dehydration and oilinessWhy skin can feel oily and dehydrated.Skin cancer signsVisual signs that need professional attention.
Looking for a solution?Start with what oily skin actually needs before adding stronger products.

Ingredients

Understand what ingredients do and whether they fit your skin.

View ingredient questions

Explore ingredients

NiacinamideA practical ingredient overview.Vitamin C serumWho can use vitamin C and when to be careful.RetinolHow retinol fits different skin types.

Use safely

Salicylic acidWhere this acne-focused ingredient fits.Niacinamide for all skin typesSuitability across skin types.Ingredient comparisonsUse comparisons to avoid mismatched decisions.
Can my skin use this?Browse compatibility questions before adding a new active.

Routines

Turn skin information into daily decisions.

View routine questions

Daily basics

Does every skin type need moisturizer?A basic routine decision.Does every skin type need sunscreen?Where SPF fits in daily care.What oily skin needsA simple care direction for oily skin.

Adjust over time

Skin changes with ageWhen your routine may need to change.Seasonal skin changesHow weather affects skin behavior.Korean skincare approachWhat is useful beneath the trend.
Starting from scratch?Begin with moisturizer, sunscreen, and one skin-specific need.

Products

A small selection of skincare products recommended by OuterDerm for simple, effective everyday routines.

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Recommended picks

Daily SunscreenDaily UV protection that has to be wearable enough to stick with.Azelaic AcidA focused 10% azelaic acid when uneven tone or blemish marks are the concern.Gentle CleanserComfortable cleansing when tight or squeaky skin is a warning sign.
Not sure where to start?Browse three carefully selected essentials, then ask on WhatsApp before you order.

Learn

Go deeper into skin science, myths, evidence, and safety.

View learning guides

Hazardous ingredients

Safety hubStart with mercury, steroids, PPD and other hazardous substances.Ingredient safety indexBrowse Phase 1 and Phase 2 hazardous ingredients.Mercury in whitening creamsLabel names, Punjab alerts, and what to do now.

Product literacy

Product literacy hubHow to read labels, claims, and INCI lists before you buy.How to read an ingredient labelINCI order, Parfum, and missing-list red flags.Fragrance-free vs unscentedHow to verify a fragrance-free claim on the ingredient list.How to choose sunscreenBroad spectrum, wearability, and a readable pack — not a fairness claim.

Skin science

Skin color geneticsHow inherited traits shape skin color.Skin color typesHow skin tone is commonly grouped.Are skin types genetic?What genetics can and cannot explain.

Evidence and myths

Can all skin types tan?Tanning, risk, and skin type.Is oily skin good or bad?A balanced view of oily skin.Why Korean skin looks flawlessTrend claims translated into practical basics.
Want the evidence layer?Use why-guides when you want causes, mechanisms, and context.

Preservative allergens family

Methylchloroisothiazolinone (CMIT)

Allergy caution

CMIT/MIT blends — check both names if you've reacted to Kathon-type preservatives.

Main concern: Preservatives are listed among causes of cosmetic contact dermatitis in NHS guidance.

Do now: Stop suspected shampoo or wipes; photograph ingredient list.

Moderate severityModerate confidenceModerate confidence evidence

Last reviewed 17 Aug 2026

Label par naam check karein Agar use kar chuke hain Evidence aur sources dekhein
Moderate confidence1 source Reviewed 17 Aug 2026OuterDerm fact-check deskModerate confidence · 1 source(s) on file Evidence aur sources dekhein
What it isA isothiazolinone preservative frequently paired with MIT in cosmetic preservation systems.
Where foundShampoo · Body wash · Kathon CG blends · Industrial wet wipes reused on hands/face
Main concernPreservatives are listed among causes of cosmetic contact dermatitis in NHS guidance.
What to doStop suspected shampoo or wipes; photograph ingredient list.

ExplainWhat the substance is

A isothiazolinone preservative frequently paired with MIT in cosmetic preservation systems.

CMIT aksar MIT ke saath mix hota hai (Kathon CG). Dono names label par dhoondhein agar pehle reaction ho.

LabelsLabel par naam check karein

CMITinciMethylchloroisothiazolinoneinciKathon CGtrade or common name
Scientific / common name
Methylchloroisothiazolinone (CMIT)
Short name
CMIT

WhereWhere it may be found

Not every product in these categories contains this substance. These are common contexts where exposure has been documented or reported.

Common product categories

  • Shampoo
  • Body wash
  • Wet wipes
  • Household cleaners (skin contact risk)

Typical exposure contexts

  • Kathon CG blends
  • Industrial wet wipes reused on hands/face
Why it appears in products
  • Synergistic preservation with MIT

If usedAgar use kar chuke hain

  • Stop exposure
  • Wash gently
  • Seek advice if rash spreads or eyelids swell

Urgent

Seek urgent medical help if you notice

  • Facial swelling
  • Breathing difficulty

OuterDerm does not diagnose reactions or prescribe treatment. Use professional care when symptoms concern you.

Report a suspected product

Salon workers

Repeated exposure in salons

  • Cleaners and hairdressers with wet work should use gloves and note product SDS where available.

RiskWhen it becomes risky

  • Occupational wet work
  • Eczema
  • Using cleaning wipes on face

HealthHealth effects by evidence strength

strong evidence

  • Allergic contact dermatitis

    Preservatives are listed among causes of cosmetic contact dermatitis in NHS guidance.

    Contact dermatitis

Medical

Symptoms requiring medical advice

  • Hand dermatitis spreading after new shampoo
  • Facial swelling from wipes

PopulationsPregnancy, children & workers

  • Workers & salon exposure

    Cleaners and hairdressers with wet work should use gloves and note product SDS where available.

    Contact dermatitis

ProductsVerified product findings

OuterDerm ke paas is waqt koi reviewed product-specific finding publish karne ke liye available nahi.

UnderstandIs substance ko detail mein samjhein

RecoverAgar use kar chuke hain — ab kya karein

ReviewSources & update history

Author: OuterDerm editorial team

Reviewer: OuterDerm fact-check desk

Last reviewed: 17 Aug 2026

  • Contact dermatitis — NHS · Accessed 2026-08-17 · United Kingdom

    Supports: Cosmetics and hair dyes can cause allergic contact dermatitis.