vitamin A

  • A photograph of orange peel and a bottle of essential oil
    Podcast

    Citral

    26 October 2017

    A compound known for its citrusy zing, and which also helps honey bees find their way home

  • News

    Golden rice trial breached ethical guidelines

    10 January 2013

    Three Chinese researchers sacked after failing to tell participants parents that rice was genetically modified

  • Carrots on a wooden desk
    Podcast

    Beta carotene

    10 October 2012

    Phillip Broadwith explores the chemistry behind this bright and colourful compound