Abstract: A method of increasing the nutritional value of mycotoxin-contaminated animal feed ingested by an animal by feeding the animal an acid-activated montmorillonite clay simultaneously with the mycotoxin-contaminated or ergot-contaminated animal feed. The acid-activated montmorillonite clay can be fed to the animal in any form, e.g., granular, powder, pellets and the like or can be admixed with other animal food or feed supplements, so long as the clay is present in the animal's stomach (digestive tract) at the same time as the mycotoxin-contaminated animal feed in an amount sufficient to absorb or adsorb mycotoxin from the digestive tract of the animal and thereby aid the animal in metabolic absorption of nutrients from the contaminated animal feed.