I find it's better for me to do things naturally than to take supplements like antioxidants.

Things like blueberries and acai have antioxidants and are natural. I would still get my fiber through smoothies. I also might cheat and eat some of the fruits and veggies rather than juicing them.

I don't think you can do that much damage to yourself by not eating wheat or protein (which you can get from veggies anyway) for a week.