It was hypothesized that Zn and Cu reductions in feed have compromised swine performance and substituting amino acid chelated (AAC) sources for traditionally employed inorganic salts (IM) may overcome environmental and swine performance problems. It was found that supplementing swine rations with Cu and Zn AAC could lower environmental impact through reduced fecal mineral concentrations and due to greater AAC bioavailability, feed rations could potentially be formulated with lower inclusions of Cu and Zn, without compromising swine’s performance.

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