Peaches Geldof had spoken candidly about her health issues, revealing that she had high cholesterol and 'the heart of a 90-year-old gangster'.
The revelations came in a previously unpublished interview the tragic mum did with The Sun.
She laughed off claims that she was anorexic and said her weight loss was down to the fact she had stopped eating junk food after warnings from doctors.
The mum-of-two baby sons – whose sudden death on Monday is still unexplained - spoke to The Sun while attending the August 2011 premiere of the movie One Day with future husband Tom Cohen.
She said: "People are like, 'Peaches is scary and anorexic'. Not really. It's ridiculous.
"I had cholesterol and the doctors said stop eating s***. So I did. If you stop eating pizza and chips you then don't look like you used to.
"Do I really look that thin? Let's be honest. How did I do it? I just stopped eating McDonald's and f****** s*** every day.
"I used to eat s*** every single day. I used to wake up with my boyfriend and eat crap. I had the heart of a 90-year-old gangster."
Peaches appeared very thin in the weeks before her death - and in the past had talked of being able to lose 10lb in a month on juice diets.
That has led to speculation that rapid dieting might have triggered a fatal heart problem.
However, a post-mortem carried out yesterday was inconclusive and toxicology tests will now be carried out in a bid to establish how Peaches died.
In the weeks leading up to her sudden death, Peaches said she was happier than ever after becoming a mum and 'had the perfect life'.
In a column for Mother & Baby magazine, the celebrity presenter told of the happiness and stability her husband Tom Cohen, and baby sons Astala and Phaedra had brought to her life.
As her family continue to grieve, the young mother's body was released by the coroner so that her loved ones can at least plan her funeral.
It is expected to be held at the Kent church where she married in 2012 and where her mother Paula Yates' memorial service took place in 2000.
Peaches' father Sir Bob Geldof has also been spending time with his baby grandsons at the family home of his son-in-law in south-east London.
Peaches' second husband is looking after their children with the help of his parents, who greeted Bob and his partner Jeanne Marine with a hug on Wednesday afternoon.