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Dr St-Onge discovered that people with
problems and lactose
had scarier and more
nightmares. She said: "If you have gastrointestinal
, that could account for a lot of what's happening in terms of sleep disturbances that could be associated with
dreams." Her
, Dr Tore Nielsen, said: "Sleep disturbances affect a huge
of the general population. One large survey found that 30-40 per cent of
will have a clinically significant sleep disorder in their lifetime." Previous research suggests that about 85 per cent of adults have a nightmare at
once a year, with about 5 per cent of people experiencing them
.