Repeat: Up to 20 per cent of Britons say they can't tolerate dairy products because of the side-effects such as bloating, abdominal pain, nausea, diarrhoea and/or constipation .
Up to 20 per cent of Britons say they can't tolerate dairy products because of the side-effects such as bloating, abdominal pain, nausea, diarrhoea and/or constipation .