- Significant advances in tracing grain have resulted from regulatory requirements and market forces. Most tracing systems rely on recordkeeping, which lacks precision when applied to bulk commodities such as grain in which commingling is common. Recent advances in the development of coded caplets made of food-grade material offer new possibilities for improving tracking and tracing of grain. Proposed use of grain tracers in afla-toxin-contaminated corn will augment existing practices to manage risk, provide greater market confidence, and may lead to future commercialization opportunities. 2011 AACC International, Inc.