One large chicken egg contains about 186 mg of cholesterol. All of that cholesterol sits in the yolk; the egg white has zero. This number has actually decreased over time as hen diets have changed. Earlier USDA sampling measured eggs at roughly 211 mg per large egg, but updated nationwide testing brought the figure down about 12%.
Why the Yolk Carries All the Cholesterol
Cholesterol is a fatty substance, and the yolk is where virtually all of an egg’s fat resides. The white is almost entirely protein and water. If you eat only egg whites, you’re getting protein with no cholesterol at all. This is why egg-white omelets became popular during the decades when dietary cholesterol guidelines were strict.
But ditching the yolk means losing most of the egg’s other nutrients. The yolk delivers about 115 mg of choline, a nutrient critical for brain function and liver health that most people don’t get enough of. It also contains fat-soluble vitamins A, D, E, and K, along with carotenoids that support eye health. Gram for gram, the yolk is one of the most nutrient-dense parts of any common food.
How Egg Cholesterol Affects Your Blood Levels
For most people, eating cholesterol has a surprisingly small effect on blood cholesterol. Your liver produces the majority of the cholesterol circulating in your bloodstream, and when you eat more of it, your liver typically compensates by producing less. This feedback loop is why dietary cholesterol was removed as a “nutrient of concern” in the USDA’s dietary guidelines.
Clinical trials back this up. In one 12-week study, 56 people ate one egg per day with no increase in LDL (the “bad” cholesterol) and a rise in HDL (the “good” cholesterol). A separate 14-week trial had young adults gradually increase from zero to three eggs daily. Their LDL stayed at or below baseline the entire time, while HDL climbed and remained elevated throughout all phases of the study.
That said, a subset of people are “hyper-responders” whose blood cholesterol rises more noticeably with dietary intake. If you already have high cholesterol or a related condition, your response to eggs may differ from the average.
Current Guidelines on Eggs and Heart Health
The American Heart Association’s 2026 dietary guidance states that dietary cholesterol is “no longer a primary target for cardiovascular risk reduction for most people.” The statement explicitly says moderate egg consumption can be part of a heart-healthy diet. The bigger concern, according to the AHA, is what people tend to eat alongside eggs: processed meats like bacon and sausage, which carry saturated fat, sodium, and preservatives that have a stronger link to cardiovascular risk than the egg itself.
Cholesterol in Other Types of Eggs
Not all eggs are created equal. Comparing cholesterol concentration per gram of yolk across bird species reveals notable differences:
- Pheasant eggs: 6.82 mg per gram of yolk (lowest)
- Quail eggs: 7.78 mg per gram of yolk
- Duck eggs: 10.81 mg per gram of yolk
- Hen eggs: 13.91 mg per gram of yolk
- Ostrich eggs: 16.29 mg per gram of yolk (highest)
These numbers are per gram of yolk, not per whole egg. A single quail egg is tiny, so even though its yolk is lower in cholesterol concentration, you’d typically eat several at a time. A duck egg is larger than a chicken egg, so one duck egg delivers more total cholesterol despite having a lower concentration per gram of yolk. The practical takeaway: if you’re eating standard chicken eggs, one large egg at 186 mg is well within what most healthy dietary patterns accommodate.
Sizing Matters
The 186 mg figure applies to a USDA “large” egg, which weighs about 50 grams. Egg sizes vary, and so does the cholesterol count:
- Medium egg (44 g): roughly 164 mg
- Large egg (50 g): 186 mg
- Extra-large egg (56 g): roughly 208 mg
- Jumbo egg (63 g): roughly 234 mg
These scale proportionally with egg weight. If you buy jumbo eggs from a farmers’ market, you’re getting about 25% more cholesterol per egg than the standard grocery-store large. It’s a modest difference for one egg, but it adds up if you regularly eat two or three at a time.