StoryOfMyLife
Depends what protocol you follow.
I think overall, most of them say NO fat on day of flush. Even the Cream+Berries flush says not to eat any fat before the cream.
On the other hand you read about people on here who eat some fat on the day they flush and have had success.
If you want to play it safe, then don't eat any. Stick to a wholefood/raw food diet on the day of flush. Lots of fruits and some vegetables. Even oatmeal has SOME grams of fat in it. I don't know why some recipies say to eat 0 fat yet recommend oatmeal.