you cannot reverse it with crap like this mate he need colon cleance 5-8 bowel movements solid no diarreia kill the fungi enzymes , fix the stress clean the gi track
give herbs like sweet Wormwood or ntence formula depends on what type of cancer and when phase 1 cleance is done some fasting if possible to get rid of it for good
plus immunomodulators and antiagiogenic /hormone blockers and you can completly can rid of it