In mould proof accelerated testing at 30 C, Penicillium sp. grew both in the blank and AST18-added groups, but a significant difference in Penicillium sp. growth conditions was found (Fig. 7). The colony morphology of Penicillium sp. in 2% AST18-added yogurt was small, and no green-yellow metabolite was produced. A lot of researchers have reported that LAB can inhibit mycotoxin production (Dalie, Deschamps, & Richard-Forget, 2010). Wiseman and Marth (1981) added the spores of Aspergillus parasiticus to a 13 day-old culture of Lactococcus Lactis and observed the entire repression of aflatoxin production.