Butylated Hydroxytoluene or BHT is a stabiliser that can be found in cosmetic products. It acts as an antioxidant that helps maintain the properties and performance of a product as it is exposed to air (to avoid a change in odor, in color, in texture…). BHT is primarily used as an antioxidant food additive.
BHT is used as a preservative ingredient in some foods. With this usage BHT maintains freshness or prevents spoilage; it may be used to decrease the rate at which the texture, color, or flavor of food changes.