New federal dietary guidelines say it’s OK to eat one egg daily. Eating one egg per day does not increase blood cholesterol levels in healthy people, according to the U.S. Dietary Guidelines for Americans. It also does not increase their risk of cardiovascular disease. Eggs today contain less cholesterol than they did 10 years ago. After testing eggs from 12 different places nationwide, researchers from the U.S. Department of Agriculture found that one egg contains about 185 milligrams of cholesterol, compared to 215 milligrams 10 years ago.