"But, remember: eggs are like all other foods -- they are neither 'good' nor 'bad,' and they can be part of an overall heart-healthy diet," Eckel wrote in a commentary.
The Harvard team studied 21,327 men taking part in the much larger Physicians' Health Study, which has been watching doctors since 1981 who have agreed to report regularly on their health and lifestyle habits.
Over 20 years, 1,550 of the men had heart attacks, 1,342 had strokes, and more than 5,000 died.
"Egg consumption was not associated with (heart attack) or stroke," the researchers wrote.
But the men who ate seven eggs a week or more were 23 percent more likely to have died during the 20-year period.
Diabetic men who ate any eggs at all were twice as likely to die in the 20 years.
Men who ate the most eggs also were older, fatter, ate more vegetables but less breakfast cereal, and were more likely to drink alcohol, smoke and less likely to exercise -- all factors that can affect the risk of heart attack and death.