Researchers at the Harvard School of Public Health looked at the diets of 100,000 Americans over 20 years. The results: a daily serving of unprocessed red meat meant a 13 percent increase in mortality risk.
A daily serving of processed meat - such as bacon or hotdogs - was associated with a 20 percent increased risk of death.
The study could not conclude red meat consumption caused the increased risk of death but showed there is a link.
The study is published in the Archives of Internal Medicine.
