Kourtney and Kim Kardashian are proud of their famous physiques, and any Keeping Up With the Kardashians loyalist knows it. On a recent episode, Kim shared that she'd whittled her waist down to 24 ...

— Well, this little miracle diet is called Keto, and stars like Kim Kardashian, 37, and Rihanna, 29, Megan Fox, 31, are fans of it.

Kourtney Kardashian has always been open about the regimented diet she follows to maintain her 100-pound physique. (For what it's worth: She's never advocated 100 pounds as the gold standard of ...

Kardashian continued, “I love doing a keto diet, though I’m not doing it now. I noticed my body change for the better. I [also] love intermittent fasting. I try to do that all the time.

Kim Kardashian’s Diet Secrets: How She Got Down To 119 Lbs Without Starving Herself Kim came under fire when her sisters commented that she looked like she 'wasn't eating' because she is so skinny.

Kardashian said that she initially tried the diet for her health, not for weight loss. “My doctor actually put me on the keto diet a couple of years ago for a metal detox,” she explained.

Kourtney Kardashian out and about on June 29, 2019 in West Hollywood, California. MEGA Kourtney Kardashian told Poosh fans that she was going back on the keto diet.

She also plans to involve intermittent fasting in conjunction with the keto diet, which means not eating for 14 to 16 hours after dinner. One day a week, Kardashian said she'll do a 24-hour fast, too.

Kourtney Kardashian, 40, says she's starting the keto diet again after going off of it two years ago. Kourtney also shared a meal plan for her keto diet.