Are eggs bad for your cholesterol?

Eggs are not simply 'bad for your cholesterol', but the answer depends strongly on what you eat alongside them. It is not the cholesterol in the egg itself, but the saturated fat in your diet that largely determines whether your LDL cholesterol rises. In a comparative study, saturated fat was clearly linked to higher LDL levels, whereas dietary cholesterol from eggs did not show that association.

Eating two eggs a day can even go hand in hand with a slight decrease in LDL, as long as the rest of the diet is low in saturated fat. There is a catch, however: on that egg-rich diet, LDL particles shifted in an unfavourable direction. There were more small, dense LDL particles (which are considered more harmful) and fewer large particles. The net effect on cardiovascular disease risk is therefore not clear.

Moreover, not everyone responds to dietary cholesterol in the same way. About two thirds of people see little difference in blood cholesterol when they eat more eggs. In the remaining one third, both 'bad' LDL and 'good' HDL rise, so the ratio between them stays largely the same. People with hereditary high cholesterol or diabetes may respond more strongly; greater caution is advisable for that group.

Large observational studies involving tens of thousands of people do find a modest association between eating more eggs and a slightly higher risk of cardiovascular disease. But this association largely disappears once a correction is made for the total amount of cholesterol in the diet. In Asian populations, no association has been found at all. Observational research also never establishes with certainty that eggs themselves are the culprit: people who eat a lot of eggs sometimes also have other dietary habits that play a role.

A practical guideline: focus on the broader dietary pattern. Reduce your intake of saturated fat (from fatty meat, butter, full-fat dairy) and eat plenty of vegetables, fruit and wholegrain products. Within such a pattern, a few eggs per week fit perfectly well for most people. If you have high LDL, diabetes or a family history of cardiovascular disease, discuss it with your doctor, because for you the threshold may be lower. Aside from cholesterol, eggs also provide high-quality protein that helps with muscle maintenance and satiety.