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BHT

Also-called-like-this: Butylated Hydroxy Toluene
What-it-does: antioxidant, preservative

Details

It's the acronym for Butylated Hydroxy Toluene. It's a common synthetic antioxidant that's used as a preservative.

There is some controversy around BHT. It's not a new ingredient, it has been used both as a food and cosmetics additive since the 1970s. Plenty of studies tried to examine if it's a carcinogen or not. This Truth in Aging article details the situation and also writes that all these studies examine BHT when taken orally.

As for cosmetics, the CIR (Cosmetic Ingredient Review) concluded that the amount of BHT used in cosmetic products is low (usually around 0.01-0.1%),  it does not penetrate skin far enough to be absorbed into the bloodstream and it is safe to use in cosmetics.

Products with BHT

CTS CHEMICAL INDUSTRIES Ret-Avit Cream 0.05% ASAP Anti-Ageing Night Cream Valeant Biacna Elizabeth Arden Retinol Ceramide Capsules Hada Labo Unscented Hada Labo Tokyo Anti-Aging Face Mask Avene Deep Moist Lotion CTS CHEMICAL INDUSTRIES Ret-Avit Gel 0.05% Hada Labo Goku-Jyun Alpha Lifting & Firming Lotion Glysomed Eczema Control Love beauty and planet Tropical Hydration Shower Gel Coconut Oil & Ylang Ylang Neutrogena Body Oil - Light Sesame Formula SkinCeuticals Retinol 1.0 Maximum Strength Refining Night Cream The Ordinary Retinol 0.2% In Squalane The Ordinary Retinol 0.5% In Squalane The Ordinary Retinol 1% In Squalane Vichy Neovadiol Magistral Elixer Avene Antirougeurs Calm Soothing Repair Mask Avon Heavenly Hydration Facial Oil Dove Go Fresh Face Cleanser Medik8 Retinol 3 Tr Mixa Hyalurogel Light RCMA Foundation SEKKISEI MYV Concentrate Oil Simple Replenishing Rich Moisturiser Abdiibrahim Acnelyse Beauty Pie Superactive Capsules Pure Double Vitamin C & Vitamin E Serum Carotone Caro Tone Black Spot Corrector Garnier Pure Active Sensitive Anti-Blemish Clarifying Toner Hada Labo Goku-Jyun Alpha Serum Neutrogena Deep Moisture Night Cream Neutrogena Ultra Sheer Face & Body Stick Sunscreen Spf 70 Revolution Skincare Fine Line Correcting Serum - 0.2% Retinol Rohto Hada Labo Gokujyun Cleansing Oil Rouses Point Pharmaceuticals Tretinoin Cream 0.025% Valeant Pharmaceuticals Retin-A (Tretinoin) Vivant Skin Care Derm-A-Gel Level 1 Wetcode Night Repair Aqua-Light Ampoule incolor Matte me Liquid Lip cream Avene Skin Recovery Cream Rich Avene Ysthéal Eye And Lip Contour Care Avon Planet Spa Radiant Gold Face Mask Avon Vitamina C Renew Clear skin by Avon Loción Tónica Facial Astringente Ducray Keracnyl Foaming Gel Elizabeth Arden Eight Hour® Cream Skin Protectant Fragrance Free La Roche-Posay Micellar Water Ultra Olay Refreshing Gel Cleanser Revolution Skincare Extra 0.5% Retinol Serum With Rosehip Seed Oil Tarte Amazonian Clay Full Coverage Airbrush Foundation CeraVe Hydrating Micellar Water