Your 6 hourly digest for BBC News - Health

BBC News - Health The latest stories from the Health section of the BBC News web site.

AUDIO: Heavy cannabis users 'fall behind' Aug 28th 2012, 06:52 Using cannabis as a teenager can cause a permanent and irreversible drop in IQ according to a study of 1,000 people in the New Zealand town of Dunedin. Professor Terrie Moffitt, from the Institute of Psychiatry at Kings College London, gives his analysis of the findings.

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