"I gained weight and struggled to lose it quickly in order to pursue my dreams of being a model," she says. "Being 20 years old, I had no idea how to lose weight fast and laxatives were an easy way out."
While Krupa managed to break her unhealthy habits before it was too late, the Bravo star is grateful she's in a much better place.
"Thank God I didn't hurt myself and stopped," she says.
Now that her eating disorder is behind her, Krupa says she's ready to focus on starting a family with her new husband Romain Zago.
"I would love to have twins – a girl and a boy, but who knows if that would happen," says Krupa. "It would be my ideal situation. Wham, bam be done with it."
Part two of The Real Housewives of Miami Reunion airs Thurs. at 9 p.m. ET/PT on Bravo.