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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

Eucerin Atopicontrol Cleansing Oil Glymed Plus Moisturize Protective Cream 15 Miss Lary Cleasing Oil Theraskin Theracne Barra Trixie Cosmetics Just A Girl Blush Palette Acnelyse Tretinoin %0.025 Acnelyse Tretinoin %0.05 Arbell Crema Gel Contorno De Ojos CTS CHEMICAL INDUSTRIES Ret-Avit Cream 0.05% CVS Health Athlete's Foot Antifungal Cream Cordes Vas Cordes Vas Creme (0.05 Tretinoin) Curalene Petroleum jelly Dermachem Gel Antirressecamento Rosa Mosqueta Dermatouch 100% Plant-derived Squalane Exact-RX Sodium Sulfacetamide July Facial Mask Keauty beauty Oil Primer Labotrat Esfoliante Maracujá Mylan Tretinoin 0.025% Gel Neutrogena Ultra Sheet Dry Touch Spf 55 NorthstaRX Tretinoin Cream Usp 0.05% Organic Harvest Happy Lips Pomegranate Lip Balm Soul Power Brasil Black Oil Óleo De Rícino Stiefel Stieva-A Tretinoin Cream 0.05% Sunmax sensitive fps 50 Taro Tretinoin Cream (.025%) Tracta Lip Balm Esfoliante Vaseline Original Protecting Jelly Vivier Corrector 2 Westminster Pharmaceuticals Sodium Sulfacetamide 10% And Sulfur 5% Cleanser Ziaja Med Izotziaja azufre Sulfur Ointment virtue Flourish Minoxidil Topical Aerosol 5% Hair Regrowth Treatment For Women Apostrophe Tretinoin Aurelderma Lumiedge Skin Gel For Sheer Radiance Aveeno Ultra-Light Sensitive Skin Mineral Sunscreen Bath & Body Works White Tea And Ginger Shower Gel Beauty secrets Drop And Clog Proof Nail Glue Belita Young Skin Instant Cream For Problem Facial Areas CVS Health Athlete's Foot Antifungal Solution Catherine Hill Kit Camuflagem Pele Escura Cifarma Regenerador E Hidratante Labial Probentol Deliplus Serum Despigmentante DongKoo Bio&Pharma Co.Ltd Adalzit Gel Eucerin Ultra White Therapy Body Lotion SPF7 EverFresh Original Petroleum Jelly Farmax Protetor Solar Sunless Fps 15 GSK Stieva-A Cream Hedge & Hedge Pharmaceutical LLP Tretinoin Cream USP