Methylisothiazolinone
icky
                    
                
                        What-it-does: 
                        
                        
                            preservative
                        
                        
                    
                
                
                
            
Details
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
                        
                            Catharine Hill Face Powder Fixer Branco - Pó Solto Natural
                        
                            Kamaleão Color Shampoo Mais Cor
                        
                            MILVA Rose Water
                        
                            12 Benefits Instant Healthy Hair Treatmeant/Leave-in
                        
                            Cindynal Calendula Pore Toner
                        
                            Dalla Makeup O Poderoso Gel Ultra Hidratante
                        
                            Deisy Perozzo Makeup Sealer
                        
                            Granado Óleo Fortalecedor De Unhas
                        
                            Hela Beauty Sun Drops FPS30
                        
                            Idraet Ferulic Serum
                        
                            JAPAN GALS Pure Beau Essence (Ceramide)
                        
                            Kamaleão Color Condicionador Mais Cor
                        
                            Kamaleão Color Creme De Pentear Mais Cor
                        
                            Sadoer Acne Face Toner
                        
                            Sondos Sesame Oil
                        
                            Sun Pharmaceutical Industries Ltd Moisturex Clenz Facial Cleanser
                        
                            Theraskin Papuless
                        
                            Zero Silver Shampoo
                        
                            Baby Lee Acondicionador Coco&Avena
                        
                            Cotton Tree Baby Wipes Non Parfum
                        
                            Da Minha Cor Pó Compacto Nubia.Afri
                        
                            Dermachem Peel Off Rosa Mosqueta E Argila Rosa
                        
                            Dot & Key 5% Aha Toner Skin Clarifying Liquid Exfoliant
                        
                            Dove Go Fresh Face Cleanser
                        
                            Grace and Glow Brightening Solution Body Wash
                        
                            Grace and Glow Miss Moisture & Glow Solution Body Wash
                        
                            Hair Chemist Pro Growth Shampoo
                        
                            Makeup Artist's Choice Glycolic Acid 70%
                        
                            PANVEL Mini Demaquilante Bifásico Panvel Faces
                        
                            Portia M Pomegranate Sensitive Toner
                        
                            RENPURE Argan Oil Luxurious Shampoo
                        
                            Rudy hamisuwarno Hairloss Solution Shampoo
                        
                            Telepoint family Rose Scented Hand Soap
                        
                            UrbanBotanics Aloe Vera Gel
                        
                            UrbanBotanics Pure Aloe Vera Gel
                        
                            UrbanBotanics Pure Aloe Vera Skin/Hair Gel With Vitamin E & Natural Emollients
                        
                            ARAVIA Professional Lactica Exfoliate 10%
                        
                            Alcare Foaming Cleanser
                        
                            Alps Goodness Rosemary Water
                        
                            Anagel Ultrasound Gel
                        
                            BioAqua Makeup Remover Hyaluronic Acid Polypeptide Gantle Cleansing Water
                        
                            BioAqua Shea Moisture Cleansing Water
                        
                            Biocom Elastina Ampollas
                        
                            Clariss Bamboo Charcoal Purifying Face Wash
                        
                            Dermachem Gel Antirressecamento Rosa Mosqueta
                        
                            Dermachem Gel Antissinais - Booster
                        
                            Dermachem Sabonete Primer Pré-Maquiagem
                        
                            Dermotivin Original
                        
                            Dr. Davey 10x Whitening Face Cleanser