ALB and cancer: The purposes of this study were to (1) evaluate ΔS-Cys-Albumin baseline values in gastrointestinal cancer patients and cancer-free control donors, (2) empirically assess the kinetic profiles of ΔS-Cys-Albumin at 23 °C, 4 °C, and −20 °C, and (3) empirically link ΔS-Cys-Albumin to the stability of clinically relevant proteins.