How long has it been since you have had a loss? If it has been less than a couple weeks...your body might just be recovering from the 12 lbs you lost already...
I did a little reading on Lindora - it sounds like something I could not do...I have to have real food. If you feel like you are starving yourself - IMHO it seems like this is kind of a bad plan. For me - if I feel deprived I tend to binge...I also don't like any plan that doesn't teach me how to eat for the rest of my life. Not that my way is the only way - but a lot of people lose weight very quickly on plans like this - only to gain it all back because they haven't built healthy habits along the way. Ok - off my soapbox...
Back to Alta- are you doing any exercise? Maybe you can kick your metabolism into gear that way.
Don't let me forget to say
to 3FC!!!