I do a raw vegan diet (with the occasional egg white and baked fish) for 10-14 days every year just to clean my system out from all the toxins I intake. I usually lose 10-15 lbs every time, then spend the rest of the year putting it back on. I'm at the end of the diet right now, and I'll be doing the master cleanse this week. Eating raw vegan really makes you feel healthy! Even just a couple weeks and I feel great for months afterwords. I can't wait until I can eat meat again, though.