Oh Boy
now you're asking
I know that Atkins is all protein and fat..you can eat as much eggs..bacon..meat and butter as you like but very little carbs (bread..potatoes)
Sugar Busters..hmmm
don't know much about this but i think you cut out sugar of course and also flour there is bound to be a website so look for
www.sugarbusters.com for more info
and the Zone is when your food is split up into 3 groups..protein..
carbs and fat (i think) something like 40-30-30..again there will be a website for more info..hope this helps