This invention provides a dietary fatty acid salt product in granulated form which optionally contains one or more additional nutrient or medicament ingredients. The dietary product can function as a rumen bypass animal feed supplement, and permit a beneficial increase in the nutrient fat content of the feed. An important aspect of the invention is the encapsulation of the granules with a polymeric coating which functions as an impermeable barrier to one or more volatile organic compounds contained in the core matrix.
