Reps for Jenny Craig and Medifast tell TMZ they won't be be helping Kim K shed her post-baby weight -- and their reason, ironically enough, is the reality TV star isn't real enough.
Interestingly, JC's rep added, "We will continue our working relationship with Mariah Carey."
Of course we don't know if Kim's even looking for a new weight loss deal ... she endorsed Quick Trim last year.
But who knew? Mariah's ass: way realer than Kim's.