Juicing is a vitamin pill dissolved in sugar water. Primal is how to eat for life.
Please try Primal again. If you lessen the carbs gradually stages before eliminating them, that might lessen your carb flu.
Get off wheat before anything... substitute with potatoes and rice if you have to. Then ramp down the rice and potatoes.
5'0" female, 44 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 111 on sugar cheat. Currently fighting off sugar/candy cravings with bulletproof cocoa and a little rice.
I (try to) follow by-the-book primal as advocated by Mark Sisson, except for whey powder and a bit of cream. I advocate a two-month strict adjustment for newbies. But everybody is different and should tweak Primal to their own needs.