Experts think this is because eating releases a rush of stress hormones when the body should be starting to relax.
People who do not see their blood pressure fall at night are known as 'non-dippers' – and have a much higher rate of heart-related death.
Late eaters were nearly three times more likely to be non-dippers, the Turkish researchers found.
Researcher Dr Ebru Özpelit, presenting her results at the speaking at the European Society of Cardiology congress in Rome, said: 'If we eat late at night, the body essentially remains on high alert as during the day, rather than relaxing for sleep.
'Stress hormones are secreted, causing blood pressure not to decrease during sleep, which should normally happen.'
Dr Özpelit, from Dokuz Eylül University in Turkey, tracked 721 on people diagnosed with high blood pressure, with an average age of 53.
She found that those who ate within two hours of going to bed were 2.8 times more likely to retain high blood pressure overnight.
Thursday, September 1, 2016
"NEVER eat after 7pm"
"Late night meals 'increases the risk of heart attack and stroke'"