What's the longest you've fasted?

That depends on what you consider fasting. I gave up beef-pork-chicken for Lent one year and it turned into a lifetsyle that went on for more than a year. One Lent I actually survived on three meals a day and no desserts. For medical reasons I once went five days on protien shakes and water, and then a couple days of just water. As any Lutheran would point out, these do not earn merit with God, but spiritually they did make me more appreciative of God's regular blessings to me and perhaps more sympathetic toward those less fortunate, and physically I lost a lot of weight and reigned in my cholesterol (not that Lent is a self-improvement program!). Funny thing, after fasting from meat, for the longest time I could not tolerate pork -- maybe there is something in those Old Testament kosher laws (but now I'm back to hot dogs and bacon).