Do simple sugar like lactose , fructose sucrose etc god directly to the bloodstream ( as I think I read somewhere expecially for fruit juice or hone) or do they feed bad bacterias in intestines ?

Lactose is fermented by the flora.  Glucose and fructose are pretty much absorbed right away.  Sucrose is not a simple sugar like glucose or fructose.  It has to be broken down in to simple sugar molecules to be absorbed.

But some of the sugars are not absorbed, and are instead excreted in the feces.  Therefore, it will reach the Candida in the colon.