Approximately 150 million children around the world are malnourished to the point of stunting. This has a serious impact not only on their height, but also on the development of their brains. Researchers have found that a poor diet and a lack of stimulation can lead to a loss of around 15 IQ points later in life. But a few cheap and simple things could easily prevent this enormous loss of global brain power.

Host: Alok Jha, The Economist’s science and technology editor. Contributors: Tahmeed Ahmed and Tafsir Hasan of the International Centre for Diarrhoeal Disease Research, Bangladesh; Sarah Cusick of the University of Minnesota; Rasa Izadnegahdar of the Bill and Melinda Gates Foundation; The Economist’s Robert Guest and Sondre Solstad. 

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