Kim Kardashian's Diet Secrets Revealed Following 60-Pound Weight Loss: 'I've Never Felt Better'

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Kim Kardashian West is feeling fierce and confident -- and we can't blame her!

The 35-year-old reality star, who gave birth to her and husband Kanye West's second child, Saint, last December, has been very vocal about her weight-loss journey over social media. Recently she hasn't been shy about flaunting her slimmed-down figure at red carpet events, on magazine covers and, of course, Snapchat. But Kim admits that losing the baby weight hasn’t been easy -- in fact, most of the time, she felt insecure.

WATCH: Kim Kardashian Excitedly Reveals Her Waist Size

"There was a moment after [Saint was born] when my body was mush," she told People. "I felt like Gumby. There was definitely a moment when I looked in the mirror and I was like, 'I am never going to be the same.'"

Last month, Kim, who is also mother to 3-year-old North, revealed over Snapchat that she was down to 132 pounds. Her goal is to lose 12 more pounds in order to get back down to "2010 Kim," when she was 30 years old and weighed 120 pounds.

WATCH: Kim Kardashian Flaunts Post-Baby Body in Skin-Tight Dress

"My butt and my hips are the last to go, but I'm not stopping!" she exclaimed. "After having two kids, and being able to get in shape and still feel good about myself, I've never felt better. I worked my a** off, I've altered my life and I'm proud of that."

Kim credits her strict Atkins diet and 6 a.m. workouts to her toned figure and 26-inch waistline. ET caught up with Colette Heimowitz, Vice President of Nutrition and Education at Atkins, on Wednesday, who gave us some insight on Kim's daily food intake.

"She was very motivated. It's easy to do Atkins," Heimowitz said. "It doesn't take a lot of supervision, it just takes learning a program and staying motivated and committed and doing it."

"We taught her how to eat the Atkins way, which is controlling carbohydrates, eating adequate protein and having healthy fats in your meal choices," she added. "On a typical day, the overarching principal is to look for protein, high-fiber carbohydrates and healthy fats."

WATCH: Kim Kardashian Is Officially Back to Her Pre-Baby Weight

That means eggs, chicken, fish, turkey and meats, or if you're vegetarian, tofu. For high-fiber carbohydrates, Heimowitz explains vegetables are the best bet -- they're high in fiber, and low in carbohydrates. "The more colorful, the better," she advised. Other foods include berries, nuts and healthy fats (olive oil dressing, avocado, butter, etc.).

"That's the beauty about Atkins," she explained. "You don't have to be fat-phobic."

Heimowitz also told ET that Kim has a sweet tooth, and doesn't deprive herself of cravings. "[Kim] loves the indulge products," she said. "We have chocolate-covered peanut butter candies that are low in carbohydrates and low in sugar. There's always a low carbohydrate alternative to a high carbohydrate food."

"Once you hit your goal weight -- once you've achieved the weight and the health benefits you're looking for -- then you can have the occasional piece of cake or slice of pizza or whatever it is," Heimowitz suggested. "As long as you control the consumption and you do it in a way that you're not blowing all reason to the wind."

WATCH: Kim Kardashian Continues to Flaunt 42-Pound Weight Loss in Curve-Hugging Dress

Aside from her healthy eating habits, the Selfish author has documented many of her workouts over Snapchat, which include boxing, sprints, early morning runs and strength-training exercises.

All of those intense gym sessions have clearly paid off.

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NEWS: Kim Kardashian Reveals She's Only 12 Pounds Away from Her 2010 Weight

Looking good, girl!

The Keeping Up With the Kardashians star is rocking her post-baby bod, baring it all on the cover of GQ's 10th annual Love, Sex and Madness issue. To see the sexy photos, watch the video below.

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