Around one in seven Manx residents could be suffering from dairy intolerance.
According to research, just 4% of people who experience regular bloating, stomach upsets and rashes have been diagnosed with the condition.
Nutritionist Angela Dowden says many people mistake the symptoms with IBS, stress or menstruation.
She advises people to keep a food diary:
Teen's self-defence claim challenged by prosecutor
Defendant tells jury 11 threats to kill were 'empty'
Workers' quick actions help contain battery fire
Officers issue update following incident in Douglas
Hockey: Fifth straight win for Bacchas in Premier League
Mixed divisions reach halfway stage of season
MHK hopes to bring windfarm discussion to next month's Tynwald sitting
Infrastructure minister admits windfarm decisions will be 'very challenging' for CoMin