AceShowbiz -

Kim Kardashian proudly shows off her enviable curves in an Instagram photo. The sexy snap, which was uploaded on the photo-sharing site on Wednesday evening, October 16, shows her wearing a white swimsuit.

Kim stands in front of a huge mirror in certain angle as she takes the photo, flaunting major sideboob. Her blond hair is a bit messy. "#NoFilter," she captioned the photo. Her baby daddy Kanye West retweeted the post and wrote, "HEADING HOME NOW."

Earlier this week, the "Keeping Up with the Kardashians" star shared her secret of post-baby weight loss. When asked by a fan on Twitter, Kim said, "I've actually been doing the Atkins diet & luv it."

A representative for Atkins, Jennifer Livingston, explained Kim's diet, saying, "After she delivered her baby on June 15, she wanted an effective and balance way to lose the baby weight. She'd done Atkins before and knew it worked, so once she got the approval of her doctor, we connected her with our Vice President of Nutrition Colette Heimowitz, who counseled her directly."

"Being a new nursing mother, she needed adequate calories to be healthy for her child and keep up her milk production. What's great about Atkins is that it's not about counting calories or depriving yourself," Jennifer explained.

The representative also revealed that Kim ate "tons of lean, nutritious foods such as fish, lean cuts of beef, leafy greens, broccoli, spinach, nuts, avocados and olive oil." She added, "It's a very balanced way for her to loose the baby weight while continuing to properly care for her daughter."