Chapter 1_Introduction to Cancer -- Chapter 2_Effect of anticancer treatment approches on gut microbiota -- Chapter 3_Synbiotic: A promising approach for the treatment of cancer -- Chapter 4_Correlation between ROS and Synbiotics for effective treatment of cancer -- Chapter 5_Influence of synbiotics on inflammation and immune microenvironment for the treatment of cancer -- Chapter 6_Synbiotics in colorectal cancer -- Chapter 7_Synbiotics in cervical cancer -- Chapter 8_Synbiotics in prostate cancer -- Chapter 9_Synbiotics in gastric cancer -- Chapter 10_Synbiotics in lung cancer -- Chapter 11_Synbiotics in small cell pancretatic cancer -- Chapter 12_Synbiotics in breast cancer -- Chapter 13_Synbiotics in hepatocellular carcinoma -- Chapter 14_Synbiotics in ovarian cancer -- Chapter 15_Regulatory issues of synbiotics in cancer.