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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

MILVA Rose Water Cindynal Calendula Pore Toner Dalla Makeup O Poderoso Gel Ultra Hidratante JAPAN GALS Pure Beau Essence (Ceramide) Sun Pharmaceutical Industries Ltd Moisturex Clenz Facial Cleanser Cotton Tree Baby Wipes Non Parfum Da Minha Cor Pó Compacto Nubia.Afri Dot and 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 Dermachem Gel Antissinais - Booster Dermachem Sabonete Primer Pré-Maquiagem Dermotivin Original Erha Acneact Gentle Acne Facial Wash Helena Professional Hair Gel Mantecorp Ivy C Face South Mane Under Eye Gels Violetta Essential Exfoliante Gel 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 HANAJIRUSHI Deep Cleansing Lotion Super Moist 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 elf cosmetics Clear Lash Brow Mascara BIU Gel De Limpieza Antibacterial Beauty Formulas Tea Tree Face Mask Caviahue Serum C Equate Kids 3-In-1 Shampoo, Conditioner, & Body Wash, Unscented Hada Labo Shirojyun Clear Lotion J.R. Watkins Liquid Hand Soap - Lemon Living proof No Frizz Conditioner Montarbo Skincare Advanced Exfoliating Cleanser Prodermic Serum C SSCPL Herbals Detan Face Pack Veganis Leche Extra Humectante Para Manos Y Cuerpo skinology Niacinamide + 3D Hyaluron Serum Andes Nature Cosmetic Snail Extract Cream Barney Kenet MD Nourishing Conditioner