Well, I looked at the Humaworm ingredients and it seems like a rather comprehensive blend. It of course doesn't feature fresh paracides such as Ginger, Radish, Garlic, Pumpkin Seeds, Papaya, Pineapple and Coconut. These are things that can be incorporated into the diet.
DE seems effective yet largely chemically inert. Side effects are practically nil.
Castor Oil can be helpful.
A fresh aloe vera leaf can do some damage. That I can attest to. Not all grocery stores have them though. Most Asian stores do. They also feature Green Papaya which, when Julienned, is reminiscent of spaghetti and makes a good salad additive.
I think that is a good place to start. You could always go for the more exotic and toxic herbs and drugs later if necessary.