Kim told Today co-hosts Hoda Kotb and Savannah Guthrie in June that she had lost 21 pounds since the Met Gala.
Khloé, who has also raised concerns about her weight loss, has lost 60 pounds in the past four years.
that she attributes to her continued IVF procedures and that has made her happier than ever with her body now that it has finally taken shape.
"Kourtney likes to point out that you can't go near either Kim or Khloé mid-afternoon as they are both so hungry they snap at anyone," the friend reportedly said.
"She is convinced that's why both her sisters are single because no man can tolerate their strict daily plans and twice-a-day workouts.
She says neither one of them ever has fun because they are counting calories so much – she feels it's impossible to ever be in a happy relationship like that."
Although most of Kim's weight loss is attributed to diet, exercise, and a lifestyle change, the trainee lawyer *did* reveal one of her secrets on social media
Kim posted an Instagram Story in August about Dr. Askhan Ghavami's Morpheus8 therapy to "tighten" her stomach.
The minimally invasive process was a "game changer!!!" "I think this is my fave laser but it’s painful lol but worth it!"