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What-it-does: preservative


As you may guess, if something is only recommended in products that you rinse off (cleansers and shampoos), then it’s probably not the best ingredient for the skin.

Methylisothiazolinone (MI) is a preservative that' super efficient against bacteria at surprisingly low concentrations. The problem with it though is that it can also sensitize and irritate the skin quite easily when it comes in leave-on formulas.

Currently, some countries are considering to ban it entirely (like Denmark) and the permitted use level is very low (under 0.01%). Luckily there are plenty of products on the market with other preservative options so if you are a better safe than sorry type it's probably best to avoid it. 

Products with Methylisothiazolinone

Dove Go Fresh Face Cleanser Skin B5 Acne Control Cleansing Mousse Himalaya Youth Eternity Night Cream Natio Pore Unclogging Face Scrub Simple Foaming Cleanser Asepxia Acne Facial Cleanser Australian Pure Beauty Moisturiser Sensitive Sorbolene Dr Sebagh Serum Repair Hada Labo Mild & Sensitive Skin Face Wash Suave Ocean Breeze Shampoo BIOSILK Silk Therapy Conditioner Himalaya Herbals Puryfing Neem Face Wash Joelle Ciocco Lotion Lactee/Perfecting Lotion Nivea Visage Q10 Plus Anti-Wrinkle Eye Refreshing Roll-On TRESemmé Botanique Nourish + Replenish With Coconut Milk & Aloe Vera Conditioner AcneFree Therapeutic Sulfur Mask BioAqua Aloe Vera 92% Soothing Gel Clinique Exfoliating Scrub Kiehl’s Men's Oil Eliminator Deep Cleansing Exfoliating Face Wash Pantene Daily Moisture Renewal Conditioner Aesop Fabulous Face Cleanser Clarins Pure Melt Cleansing Gel Freeman beauty Cleansing Apple Cider Vinegar Clay Mask + Scrub Hada Labo Hydra & Whitening Face Wash Hada Labo Softening & Whitening Face Wash Head & Shoulders Classic Clean Shampoo Obagi Sun Shield Matte Broad Spectrum Spf 50 tgin Honey Miracle Hair Mask Arctic Fox Hair Color Aunt Jackie's Don'T Shrink Flaxseed Elongating Curling Gel Aussie Deep Treatment 3 Minute Miracle Moist Dermacare Custom Base Freeman beauty Detoxifying Charcoal + Black Sugar Illamasqua Hydra Veil NENUCO Jabón Líquido Ultra Suave Freeman beauty Exfoliating Pink Grapefruit Facial Scrub Hada Labo Tokyo Gentle Hydrating Cleanser Organic Care Shampoo Dry Nourish Peter Thomas Roth Mega Rich Conditioner Urban Skin Rx Ph Balance All Skin Toner blinc Mascara Amplified Aesop Purifying Facial Exfoliate Paste Biore Charcoal Pore Minimizer Dermasil Dry Skin Treatment - Original Lotion Hada Labo Deep Clean & Pore Refining Face Wash Obey Your Body Mineraux Purifying Gel Peel Wen Fig Cleansing Conditioner Clinique City Block Purifying Charcoal Cleansing Gel Joelle Ciocco Lotion Aromatique/Botanical Lotion Real Techniques Brush Cleansing Gel