An emulsifier, a molecule with a water soluble (hydrophilic) part and a fat soluble (lipophilic) part, is a commonly used ingredient in animal feed. Because a emulsifier has the unique ability to dissolve in both water and fat, it can aid in the mixing of the two substances.

As a result, emulsifiers can improve the fat digestibility and subsequent increase in energy efficiency in animal diets. Fats and oils are valuable and cost intensive sources of energy for livestock. Improving energy efficiency is not only important from an economical perspective, but also can contribute to an overall more sustainable animal production.