The 34-year-old, dubbed 'Octomom' by the media, told Us Weekly that she had lost the weight through healthy eating and regular exercise.
"Even my Ob-Gyn is astounded at how I've snapped back and she knows I haven't had anything done," she said.
"I topped 270lbs while pregnant [by] eating everything in sight. It was insane."
Suleman, who also has six other children, explained that she does thrice-weekly midnight work-outs while a nanny watches over the children.
She also claimed that she had devised her own ab-flattening work-out device using a dumbbell but was keeping it a secret in the hopes of landing an exercise tape deal.
"I'm very happy but it's hard work," she added.