The main components in rendered animal fats are oleic, palmitic, stearic, palmitoleic, linoleic and myristic acid. In other words, if you see any of these terms in an ingredients list, you may be looking at a substance sourced from animal tallow (or another animal-based source), and would be wise to contact the company to find out the ingredient’s origin.
As well as in the food industry, tallow and other animal fats are used for pharmaceuticals, cosmetics, personal care products, inks, paints, coatings, adhesives, lubricant and soaps. Tallow is also used in industrial animal feed and in bird food, believe it or not.
Historically, tallow was used to make candles, producing a cheaper alternative to wax candles. It is used as a lubricant for machinery and for ammunition. Tallow is also the primary ingredient in some leather conditioners. In Germany, deer tallow is commonly used as a base ingredient in salves.