choline.
The yolk contains many of the egg’s nutrients.
Choline is particularly interesting because it plays an important role in cell membranes, nervous-system function, and normal metabolism.
Egg yolks also contain carotenoids such as lutein and zeaxanthin, compounds associated with eye health.
So throwing away the yolk isn’t automatically healthier.
For many people, the whole egg can be a valuable part of a balanced diet.
But one nutrient in the yolk has kept eggs at the center of nutrition debates for decades—and understanding it helps put the viral warnings into
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