Compositions comprising thermo-modified nutshells, for example hazelnut shells, are described herein. The compositions can also comprise one or more feed additives, pharmaceutically acceptable diluents and/or excipients. Also included are methods for producing the thermo-modified nutshell compositions, and methods for using the compositions to treat diarrhea and adsorb toxins as well as promote growth and improve the overall health in humans and other animals.
