A March 2012 study from Harvard found that eating one serving (3 oz.) per day of red meat is associated with a 13 percent higher risk of death. Eat one serving of processed red meat daily (like 2 slices of bacon or one hot dog) and that risk jumps to 20 percent. Researchers think that could possibly be due to red meat’s saturated fat and cholesterol content as well as the sodium and nitrates in processed varieties. (The authors point out that they didn’t differentiate between lean and fatty cuts, so it’s unknown whether lean meat possesses less risk.)