GPT and liver disorder: Previous studies showed that the administration of a combination of SIL + CGA standardized extract (PHYTO-LAYERTM), administered intermittently at a dose of 1 mL/L to 41-week-old laying hens affected by liver disorders (liver steatosis and FLHS), improved liver function by reducing alanine-aminotransferase (ALT) enzyme activity, ameliorated the severity of liver steatosis, and improved some blood indices (e.g., red blood cells, hemoglobin and hematocrit) after the peak of production (26).