Kim Kardashian has one of the best beach bodies in Hollywood, so it seems like the perfect next step for the svelte starlet to help others achieve her enviable physique. Kim and her celeb sis, Khloe, are launching a cleanse with GNC called Quick Trim. “It’s a lemonade-based cleanse. It’s ready to go! Khloe has lost 20 pounds off of it,” the Keeping Up With the Kardashians star said at the “Aces & Angels” Celebrity Poker Tournament at the Playboy Mansion in LA on July 11. Kim added that the 48-hour cleanse is the only of its kind she could ever finish. “I tried the pepper ones for literally half a day. I couldn’t stick to it! But I can totally do this,” she exclaimed.