Dr.A doesn't want you having aspartame which most sugar free jellos use. In his one week Induction menu it states: Gelatin dessert made with sucralose(splenda), topped with whipped cream.
My boyfriend and I have been eating sugar free jello through out the whole Induction phase and lost weight.
But be aware that heavy cream occasionally slows down weight loss in some people and may need to be avoided.
Good Luck!!