Rachael, fasting is a beautiful thing! It is full body cleansing and escourts toxins out of the body in droves!
BEFORE fasting, it is wise to open up the organs of elimination so released toxins may get out of the body instead of just moved into circulation; this can make you feel quite ill!
Organs of elimination:
~colon
~kidneys
~liver
~lymph
~lungs
~skin
~~parasite cleansing is a place to start to clean any and all of these.
The more work you do on all of these, the easier the fast will be. I'd recommend at least one week before you begin on all of these. If you use a single line of herbal cleansers, they will work together and cause no problems.