i agree with endlessness on the purity of your conviction and intent being the most impressive AND important aspects of your proposed program.  SWIM has had many an ayahuasca journey both fasted and fed....he is a professional athlete and as such keeps himself in the best of health with only righteous whole foods, plenty of hi-quality water, rest and focussed training.  his body is his temple and because of his respect and honor for it, he has found no difference whatsoever in the depth of his connection with the spirit world when imbibing Jurema in either state.  it is his INTENTION that has made this so.  don't get me wrong, i understand and respect those who choose to fast, etc., but i know that for me (and many i have observed) fasting is VERY challenging and shocking to the system.  simply cleaning up one's diet and eating in moderation (ie: eating until you're no longer hungry....not until you're FULL) is a wonderful way to prepare AND nurture your temple at the same time.  be careful with being too austere/severe with your sacred spacesuit brother....keep in mind that when you go into a "starvation" mode, it doens't necessarily equate to "going to absorb the spirit more completely"....when the body is running lean and efficient, it is "primed", if you will, to process and assimilate much more readily.

i share because i care.  and as the old adage goes: "if you would be loved, love and be loveable."  this applies toward ones' self as well! 

love and gratitude!