- Exceeding the recommended daily amount of vitamins can harm health
- Decade-long study found it increases the risk of cancer and heart disease
- ‘Supplements are not actually beneficial for health’ leading doctor warns
- Getting vitamins from eating healthy, nutritious food is preferable, he said
Dr Tim Byers, of the University of Colorado Cancer Centre, said: ‘We are not sure why this is happening at the molecular level.
‘But evidence shows that people who take more dietary supplements than needed tend to have a higher risk of developing cancer.’
Two decades ago, research found people who ate more fruits and vegetables tended to have less cancer.
So Dr Bryers began to investigate if taking extra vitamins and minerals would further reduce the risk of developing the disease.