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That yellow part is called the Yolk. An egg yolk is the most nutritional part of an egg. It is where the embryo of the chicken would form if the egg was both fertilized and incubated. Egg yolk consists of half the egg's proteins, excellent levels of vitamins A, D, and E.It is a good source of essential fatty acids and a broad range of other vitamins and minerals.

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14y ago

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