Amy Winehouse's brother has claimed an eating disorder killed his sister rather than drug and alcohol abuse.

After the 'Back To Black' singer died on 23 July 2011, the coroner ruled a verdict of misadventure - discovering that she had more than five times the legal drink-drive limit of alcohol in her system.

However, her older brother has now told The Observer that he blames his sister's long battle with bulimia, which she developed aged 17, for leaving her "weaker and more susceptible".

amy winehouse

"She would have died eventually, the way she was going, but what really killed her was the bulimia," Alex said. "Had she not have had an eating disorder, she would have been physically stronger.

"[Her friends] were all doing it. They stopped doing it, but Amy never really stopped. We all knew she was doing it but it's almost impossible [to tackle], especially if you're not talking about it."

The Amy Winehouse Foundation recently donated money to eating disorder charity Beat to help fund an internet forum with a dedicated moderator.

Alex, along with his wife Riva, is preparing to open an exhibition to let fans of the star see the real Amy.

amy winehouse alex winehouse

Amy's brother Alex and her mother Janis.

The 'Rehab' singer's life will be celebrated this summer at London's Jewish Museum.

Her family have given the Camden-based Jewish museum unprecedented access to Amy’s belongings in a bid to reclaim her identity as a North London Jewish girl.

Fans will be able to see the guitar Alex taught her to play on, her record and books collection and a vintage bar from her former home.

Photographs are said to be an important part of the exhibition and the suitcase crammed with pictures that Amy insisted her father come to look through with her a couple of days before her death - the last time he saw her - will also be on show.

Meanwhile, a documentary film about Amy's life is also in the works and is being brought to the screen by 'Senna' director Asif Kapadia.

"Amy was a once-in-a-generation talent who captured everyone's attention; she wrote and sung from the heart and everyone fell under her spell," Kapadia and his producer James Gay-Rees said in a statement.

"But tragically Amy seemed to fall apart under the relentless media attention, her troubled relationships, her global success and precarious lifestyle.

"As a society we celebrated her huge success but then we were quick to judge her failings when it suited us."

Visit the Jewish Museum's website for more details.

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  • BRIT Awards 2008 - Show - London

    Amy Winehouse and Mark Ronson on stage, during the BRIT Awards 2008, at Earls Court in central London.

  • BRIT Awards 2007 - Show

    Amy Winehouse performs on stage during the Brit Awards 2007 at Earls Court Exhibition Centre in central London.

  • MTV Movie Awards 2007

    Amy Winehouse arrives for the 2007 MTV Movie awards at the Gibson Amphitheatre, Universal City, Los Angeles.

  • Winehouse in court

    Amy Winehouse arrives with her father Mitch (right) at City of Westminster Magistrates Court in London for her court appearance.

  • 46664 Concert - London

    Amy Winehouse leads the celebrations on stage at the 46664 concert honouring Nelson Mandela's ninetieth birthday in Hyde Park, London.

  • The Mojo Honours List Award Ceremony - London

    Amy Winehouse and her boyfriend Blake Fielder-Civil arrive for the Mojo Honours List award ceremony at The Brewery, east London.

  • Amy Winehouse at court - London

    Amy Winehouse leaving Westminster Magistrates Court in central London, as she stands trial on a charge of assault.

  • Amy Winehouse Sighting - London

    Amy Winehouse spotted out and about in Soho, central London.

  • Amy Winehouse at court - London

    Amy Winehouse arrives at Westminster Magistrates Court on the second of a trial for alleged assault.

  • Amy Winehouse sighting - London

    Amy Winehouse hand in hand with Tyler James in Covent Garden, London.

  • Amy Winehouse Sighting - London

    Amy Winehouse seen in Covent Garden, London.

  • The Libertines gig - London

    Amy Winehouse watches the Libertines perform on stage at the Forum in Highgate, London.

  • Amy Winehouse & Pete Doherty Sighting - London

    Singers Pete Doherty and Amy Winehouse spotted out in central London.

  • Amy Winehouse Leaving For Court - London

    Amy Winehouse, and her father Mitch, leave her north London home for her court appearance.

  • Amy Winehouse Sighting - London

    Amy Winehouse spotted out and about at 4am. The singer has been keeping some erratic hours of late and last night was no different. After leaving her new Bow home at 4am, Amy hot footed it back to the homeland Camden where she went shopping for ice pops and hooked up with pal Sadie Frost and her pal Tommy.

  • Blake Fielder-Civil in court

    Singer Amy Winehouse arrives at Thames Magistrates Court, east London, to see her husband, Blake Fielder-Civil, appear on charges of perverting the course of justice.

  • Amy Winehouse Sighting - London

    Amy Winehouse spotted on a night out in Camden, north London.

  • BRIT Awards 2008 - Show - London

    Amy Winehouse on stage at the Brit Awards 2008, Earls Court, London.

  • Amy Winehouse Sighting - Camden

    Amy Winehouse spotted out in Camden, north London.

  • 46664 Concert - London

    Amy Winehouse performs during the 46664 concert honouring Nelson Mandela's ninetieth birthday in Hyde Park, London.

  • Glastonbury Festival 2008 - Day Two

    Amy Winehouse performs on the Pyramid Stage during day two of the Glastonbury Festival, Somerset.

  • SHOWBIZ Winehouse Launch

    Singer Amy Winehouse during her performance at HMV Oxford Street, central London, where she celebrated the release of her new single Take The Box and signed autographs.

  • Amy Winehouse - Q Awards

    Singer Amy Winehouse backstage during the 15th annual Q Awards at Grosvenor House in London's Park Lane. Jonathan Ross hosts the music magazine awards honouring the best in the industry.

  • Ivor Novello Awards - London

    Amy Winehouse wins the Best Contemporary song award for her song 'Rehab' at the Ivor Novello Awards held at the Grosvenor House Hotel in cental London.

  • Amy Winehouse Sighting - London

    Amy Winehouse and Dionne Bromfield seen out and about in Camden, north London.

  • The 2008 Ivor Novello Awards - London

    Amy Winehouse and her dad Mitch during the 2008 Ivor Novello Awards, at Grosvenor House, central London.

  • Amy Winehouse

    FILE - In this July 24, 2009 file photo, British singer Amy Winehouse leaves Westminster magistrates court in London after a judge acquitted her of assaulting a fan who asked to take her picture. Winehouse had no illegal drugs in her system when she died, and it is still unclear what killed the singer, her family said Tuesday, Aug. 23, 2011. The family said in a statement that toxicology tests showed "alcohol was present" in the singer's body but it hasn't yet been determined if it contributed to her death. (AP Photo/Kirsty Wigglesworth)

  • Amy Winehouse

    FILE -- In this Feb. 20, 2008, file photo, Amy Winehouse performs at the Brit Awards 2008 in London. A new album of recordings by the late soul singer Amy Winehouse will be released in December, Island Records said Monday Oct. 31, 2011. It said "Lioness: Hidden Treasures" will contain 12 songs previously unreleased tracks, alternative versions of existing hits and brand new songs recorded by the beehive-wearing singer who died at her London home on July 23. .(AP Photo/Matt Dunham, file)

  • Amy Winehouse

    FILE - In this June 27, 2008 file photo, British singer-songwriter Amy Winehouse performs at the 46664 charity concert in honor of Nelson Mandela's 90th birthday in London. Winehouse had written all the songs that were to appear on her third album. She even picked out song titles. But music producer Salaam Remi said the singer was not rushing to release that new material. Only two of the tracks Winehouse wrote were recorded and appear on her compilation album, “Lioness: Hidden Treasures.” It will be out on Dec. 5. (AP Photo/Lefteris Pitarakis, File)

  • T in the Park festival 2008 - Scotland

    Amy Winehouse performs on the main stage at T in the Park music festival near Kinross in Scotland.

  • Isle of Wight Festival 2007

    EDITORIAL USE ONLY: Amy Winehouse performing at the Isle of Wight Festival in Seaclose Park on the Isle of Wight. Picture date: Saturday June 9, 2007.

  • Mercury Music Prize - London

    Amy Winehouse performs during the Nationwide Mercury Music Prize at the Grosvenor House Hotel in central London.

  • Music - Amy Winehouse - Vodafone TBA - Bristol

    Amy Winehouse performs during an exclusive Vodafone TBA concert at Circomedia in Bristol.

  • Amy Winehouse in concert

    Amy Winehouse performs at the Union Chapel in Islington, north London during a MENCAP benefit concert.

  • Amy Winehouse

    FILE - In this Friday Feb. 16, 2007 file photo British singer Amy Winehouse poses for photographs after being interviewed by the Associated Press at a studio in north London. British officials say the coroner who oversaw the inquest into the death of singer Amy Winehouse has resigned after her qualifications were questioned. Winehouse's relatives said they were still absorbing the implications of the news. In October, coroner Suzanne Greenaway ruled that the soul singer had died from accidental alcohol poisoning. (AP Photo/Matt Dunham, File)

  • The Brit Awards 2007 - Arrivals

    Amy Winehouse arrives for the Brit Awards 2007 at Earls Court Exhibition Centre in central London.

  • V Festival 2008 - Essex

    EDITORIAL USE ONLY : Amy Winehouse performs on the second day of the V Festival at Hylands Park, Chelmsford, Essex.

  • MTV Movie Awards 2007

    Amy Winehouse and her husband Blake Fielder-Civil arrive for the 2007 MTV Movie awards at the Gibson Amphitheatre, Universal City, Los Angeles.

  • Oxegen Festival 2008 - Ireland

    Amy Winehouse performs at the Oxegen music festival which runs all weekend at Punchestown Racecourse in Co. Kildare.

  • Amy Winehouse sighting - London

    Amy Winehouse hand in hand with Tyler James in Covent Garden, London.

  • Amy Winehouse

    En esta fotografía de archivo del 3 de junio de 2007, se ve a la cantante británica Amy Winehouse a su llegada a los MTV Movie Awards en Los Angeles. La familia de Amy Winehouse puso a la venta la casa en Londres que era propiedad de la desaparecida cantante por 2,7 millones de libras (4,2 millones de dólares). (Foto AP/Kevork Djansezian, Archivo)

  • BRIT Awards 2007 - Show

    Amy Winehouse performs on stage during the Brit Awards 2007 at Earls Court Exhibition Centre in central London.

  • Amy Winehouse

    En esta foto de archivo del 16 de febrero del 2007, Amy Winehouse posa en un estudio en el norte de Londres. Mitch Winehouse, el padre de la cantante británica, dice que le sido muy difícil disfrutar del exitoso álbum de su hija "Back to Black" porque las canciones hablan de su ex esposo, Blake Fielder-Civil, a quien culpa de llevarla al alcoholismo y la drogadicción, detallando su larga caída en el libro, "Amy, My Daughter". (AP Foto/Matt Dunham, Archivo)

  • Reg Traviss rape charge

    File photo dated 13/07/2010 of Amy Winehouse with Reg Traviss, who has been charged with two counts of rape, sources said today.

  • 'I never knew how talented Amy was'

    Amy Winehouse and her dad Mitch who has admitted that he realised how talented his daughter was only after she died.

  • Amy Winehouse sales

    File photo dated 22/06/07 of singer Amy Winehouse, who is still proving to be one of the most popular British recording artists of modern time, with fans buying more than 1.7 million copies of her recordings in the year since her death.

  • Amy Winehouse

    En esta foto de archivo del 8 de enero del 201, Amy Winehouse canta durante un concierto en Florianopolis, Brasil. Winehouse murió hace un año, el 23 de julio del 2011, a causa de un envenenamiento etílico accidental. Tenía 27 años. (AP Foto/Nabor Goulart, Archivo)

  • Amy with Blake

    Amy Winehouse with Blake Fielder-Civil,

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