The Applause singer told the March issue of Harper's Bazaar magazine: "I don't have an eating disorder anymore."
"I am better with food," she said. "I'm also better at not letting people take advantage of me... I should be around people who cherish my talents, my health, my time."
She added: "I'm not a pawn for anyone's future business. I'm an artist. I deserve better than to be loyal to people who only believe in me because I make money."
The pop sensation also admitted that last year was one of the hardest years of her career – 2013 saw her cancel her tour to have hip surgery, part ways with her long-term manager Troy Carter and receive mixed reviews for her latest album ARTPOP – and opened up about suffering from depression.
She said: "I became very depressed at the end of 2013. I was exhausted fighting people off. I couldn't even feel my own heartbeat. I was angry, cynical, and had this deep sadness like an anchor dragging everywhere I go.
"I just didn't feel like fighting anymore. I didn't feel like standing up for myself one more time – to one more person who lied to me."
She added: "I really felt like I was dying – my light completely out."
But the pop star, who smoulders on the cover of the magazine in a sparkling black sequin top, says she was determined to beat depression for her friends, family and fans.
She continued: "I said to myself, 'Whatever is left in there, even just one light molecule, you will find it and make it multiply. You have to for you. You have to for your music. You have to for your fans and your family.'"
The blonde bombshell shared that she is in a much better place now, and has rediscovered her passion for music.
"You just have to go back to that greatness, find that one little light that's left. I'm lucky I found one little glimmer stored away."