you can do the cleanse if you're hypoglycemic or even diabetic.
have you ready stanley burrough's book? he outlines some advice in there.
i found since doing the cleanse my blood sugar is a lot more stable. it doesn't drop as often or as severely as it used to pre-MC.
while doing the fast i always kept a glass/bottle of lemonade with me at all times so i'd never feel hungry/weak/shaky and i used 1.5 tbs in my first morning drink but after that i did about 1tbs for the rest of the day and that worked well for me.