Several studies have suggested that ADIN content in DGS does not accurately predict protein digestibility (Ham et al., 1994; Nakamura et al., 1994; Kelzer et al., 2010), with wide differences in ADIN concentrations resulting in only very small alterations in estimated total-tract CP digestibility. Based on such findings, there is likely little reason to attempt to quantify ADIN in DGS samples on a regular basis, although having a mean estimate of ADIN over time from different source plants may still be useful.