Yes I am aware of he Hippocrates Health Intitute and several other's that espouse to the ANn Wigmore style of juicing/rawfood/ lifestyle. Norman Walker and her really got things going and Gerson benefitied form Walkers juice press as well. It all ties together.
As far as the arsenic thing. Watch the documentary. It is covered in it.
Wheatgrass (all grasses) are great for initial phases of cleansing.