^^^ Four to six grams of vitamin C, daily. 
Diarrhea guaranteed!
For the extra cleansing effectzx
Vitamin C is very safe but once you go past 2,000mg it can cause GI upset including diarrhea.
Is it possible to take too much vitamin C?
https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/vitamin-c/faq-20058030
It's possible to take too much of just about anything, right? How does anybody really know until he notches the amount up and up until he finds his own limit? Doesn't excessive V-C generally just pass?