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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 Theraskin Theracne Barra Trixie Cosmetics Just A Girl Blush Palette Arbell Crema Gel Contorno De Ojos CTS CHEMICAL INDUSTRIES Ret-Avit Cream 0.05% Cordes Vas July Facial Mask Labotrat Esfoliante Maracujá Neutrogena Ultra Sheet Dry Touch Spf 55 Organic Harvest Happy Lips Pomegranate Lip Balm Stiefel Stieva-A Tretinoin Cream 0.05% Sunmax sensitive fps 50 Tracta Lip Balm Esfoliante Vaseline Original Protecting Jelly Vivier Corrector 2 Ziaja Med Izotziaja Apostrophe Tretinoin Aveeno Ultra-Light Sensitive Skin Mineral Sunscreen Bath & Body Works White Tea And Ginger Shower Gel Cifarma Regenerador E Hidratante Labial Probentol Eucerin Ultra White Therapy Body Lotion SPF7 Farmax Protetor Solar Sunless Fps 15 GSK Stieva-A Cream Hedge & Hedge Pharmaceutical LLP Tretinoin Cream USP Hollywood By Dr. Rey Anti-Aging Facial Creme L'Oreal Micellar Water Complete Cleanser Normal To Oily Skin Mandom Petroleum Jelly Neutrogena Ultra Sheer Drytouch Sunblock SPF70 Nizoral Ketoconazole Anti Dandruff Shampoo Obagi Blender Obagi Clear Obagi Clenziderm M.d.® Therapeutic Lotion Ortho Dermatologics Altreno (Tretinoin) Lotion, 0.05% Perrigo Tretinoin 0.025% Gel Peter Thomas Roth Acne Clearing Wash Rogaine Hair Regrowth Treatment SR12 Lip Care (natural) Shu Uemura Rouge Unlimited Matte Valeant Biacna Valeant Pharmaceuticals Biacna Topical Gel Value by Midwood Vitamin E Moisturizing Skin Oil 4,000 I.U asap Anti-Ageing Night Cream Bath & Body Works Cashmere Glow Body Lotion Bath & Body Works Dark Kiss Body Lotion Bath & Body Works Mad About You Body Lotion Bath & Body Works Ocean 2-In-1 Hair + Body Wash Bath & Body Works Teakwood 2-In-1 Hair + Body Wash Becca Zero No Pigment Glass Highlighter For Face + Lip Bella Aurora CC Cream SPF50+ Color Cream Cantabria Labs Biretix Gel Ultra Purifying