It is now widely accepted that eggs have no meaningful impact on blood cholesterol levels. Dietary cholesterol is said not to impact blood cholesterol.

But is this true?

The impact of eggs on dietary cholesterol—and health—really depends on background diet and genetics.

Now, it’s true that the impact of dietary cholesterol on blood cholesterol is quite modest [1], and it only impacts about 20-30% of the population [2]. But, on the other hand, almost nobody knows whether they are in that 20-30%, so some caution might be warranted in those who are pursuing optimal health and find their LDL cholesterol levels a little high.

In the context of unhealthy diets, eggs actually seem to produce benefit, since they replace less healthy foods.

But in the context of healthier diets, eggs may be slightly harmful, by displacing healthier foods that have a lower impact on dietary cholesterol.

Overall, the impact of eggs on health seems heterogeneous and may depend on the baseline diet: more healthy diets may seem more harm if eggs are incorporated, and vice versa [3,4].

If LDL cholesterol is a little high, and diet quality is otherwise excellent, it might be advisable to try replacing the eggs with another source of protein that is lower in dietary cholesterol.

Ideally, this should be done using a lipid test to look at before and after values of blood LDL cholesterol.

PMIDs

[1] 30596814

[2] 24466502

[3] 32132002

[4] 35360933

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