This is an excerpt from a post Willow did concerning encapsulating the IF#1:
Aloe Leaf/Gel
Turkey Rhubarb
Cascara Sagrada
Senna lead/pod
Barberry root bark
Garlic
Ginger root
Cayenne
Most of the herbs in the formula are very bitter, so much so that a person couldn't stand to consume it in powder form. Plus you've got the Cayenne that is hot. It isn't a requirement to encapsulate it but chances are the first time a person tastes it will be the last time they take it.