Parasites fill the body with toxins. The liver is the primary purifying organ of the body, meaning it has to remove all toxins present whether those toxins come from the environment or are produced internally (as with parasite infections).
The liver also has to make almost 2 quarts of bile every day for digestion. If the liver is too busy removing toxins, it cannot produce enough bile. This causes consipation, diarrhea or a combination of the 2.
Candida is a secondary infection from hosting parasites. I recommend removing the parasites, remove the excess candida then rebuild the liver.