The star has signed on to team with Atkins and will be partaking in the Atkins 40. Kardashian, 35, previously used Atkins to help lose weight after the birth of her daughter North in 2013.
She added: "This is going to be soooo f---ing hard but I can do it and I can't wait to share it all with you! #BeastMode #WhosWithMe ?!?!?!"
Kardashian gained 60 lbs. while pregnant with baby Saint, who was born Dec. 5.
Kardashian West was 130 lbs. when she got pregnant with Saint and weighed 190 lbs. at the end of the pregnancy She had lost 17 lbs. through breastfeeding and dieting by mid-December. On Twitter announcing the news Tuesday, Kardashian revealed she had lost 30 pounds but was seeking to lose 30 more.
I'm so excited! I'm 30 lbs down today but 40 to go! I'm so focused. I will show u guys my workouts on my app & share my Atkins plan too!— Kim Kardashian West (@KimKardashian) January 19, 2016
I gained 60lbs during my pregnancy but have been an extra 10 lbs up for the last few years so it's time to really get to my goal— Kim Kardashian West (@KimKardashian) January 19, 2016
The Atkins 40 diet encourages its users to eat food options from each food group, including carbohydrates, protein and fat. It boasts that its dieters can enjoy things like vegetables, pasta and potatoes and not feel like they are depriving themselves.