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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

Mantecorp Sabonete Líquido Facial Glycare MILVA Rose Water Cindynal Calendula Pore Toner Dalla Makeup O Poderoso Gel Ultra Hidratante Hela Beauty Sun Drops FPS30 Idraet Ferulic Serum JAPAN GALS Pure Beau Essence (Ceramide) Sun Pharmaceutical Industries Ltd Moisturex Clenz Facial Cleanser Zero Silver Shampoo Cotton Tree Baby Wipes Non Parfum Da Minha Cor Pó Compacto Nubia.Afri Dot & Key 5% Aha Toner Skin Clarifying Liquid Exfoliant Dove Go Fresh Face Cleanser PANVEL Mini Demaquilante Bifásico Panvel Faces RENPURE Argan Oil Luxurious Shampoo Telepoint family Rose Scented Hand Soap ARAVIA Professional Lactica Exfoliate 10% Alcare Foaming Cleanser All in one Micellar Cleansing Water Biocom Elastina Ampollas Dermachem Gel Antissinais - Booster Dermachem Sabonete Primer Pré-Maquiagem Dermotivin Original Erha Acneact Gentle Acne Facial Wash Helena Professional Hair Gel Htderm Intensive Depigmentation Cream Mantecorp Ivy C Face Ravenna Água Micelar South Mane Under Eye Gels Sutra Beauty Conditioner Violetta Essential Exfoliante Gel Woolworths Gel Cleanser African Extracts Roobos Refreshing Toner Bruno Vassari Extra Rich Cleansing Foam Carthage Regeneración + O2 Dermachem Gel Antioleosidade Ácido Salicílico Dermachem Dermur Azuleno Dot & Key AHA + BHA HYDRO PEEL EXFOLIATING SERUM Dot & Key Booty Polish Walnut & Coffee Dot & Key Glow Revealing Vitamin C Serum Concentrate Dot & Key Hydro Peel Glow Potion 10% Aha + 2% Bha Exfoliating Serum GNC Pets Hypoallergenic Shampoo HANAJIRUSHI Deep Cleansing Lotion Super Moist Hidraderm ciclos Serum Vitamina C Hidraderm Ciclos Himalaya Herbals Purifying Neem Cleansing Astringent Toner Icono Acido Hialurónico Extracto En Gel Kueshi Waterproof Makeup Remover Makeup Artist's Choice Gly-Luronic Miracle Correction Serum Menarini Acnelak 4In1 Pimple Care Face Wash Skin doctors Instant Eyelift