I am convinced that spices and herbs can be very helpful.

Raw garlic is amazing stuff. So is cayenne pepper and horseradish. Some other easy to find, inexpensive herbs good for detoxification are ginger, black pepper, dandelion, cinnamon, peppermint, and licorice root. Turmeric is also great but not so easy to find cheap(if you don't mind taking in coriander, then you could get curry powder).

Horseradish, cayenne pepper and licorice root are also great at combating constipation without any adverse side effects.