Eating red meat may increase mortality risk and diseases among the elderly, according to the National Cancer Institute.

The study says people who eat large amounts of red and processed meats such as steaks, burgers and pork chops face a "moderate" risk of death from heart disease and cancer.

Scientists in Britain report eating ten portions or more a week of red meat also increases the risk for blindness in old age.

One dietician said lean meat is okay as part of a balanced diet along with exercise and avoiding smoking.

Previous studies found a link between red meat and an increased risk of heart disease and cancer. The new study is the first large examination of the relationship between eating meat and the increased chances of dying prematurely.