Abstract: A feed additive for monogastric animals, comprising dried glutamic acid fermentation solubles, dried corn fermentation solubles, or a mixture of dried glutamic acid fermentation solubles, wherein said dried solubles have been dried to a total moisture content of less than 30% by weight at a temperature that does not denature any organic nitrogen compounds present in the solubles and wherein the feed additive increases reproductive efficiency in monogastric animals.