Find out what the white thread is in the raw egg; spoiler: it’s not an umbilical cord

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Chalaza is a gelatinous thread that has the function of keeping the yolk or embryo (in the case of fertilized eggs) centralized. Raw egg Photo by Klaus Nielsen When you crack an egg, have you ever noticed a white thread stuck between the yolk and the white? You might think it’s an umbilical cord, but it’s not. This is the chalaza, a gelatinous thread that has the function of keeping the yolk or embryo (in the case of fertilized eggs) centralized. 🐔It is not exclusive to chickens: chalaza is present in various types of eggs, such as quail eggs and other species, explains researcher Helenice Mazzuco, from the Brazilian Agricultural Research Corporation for Pigs and Poultry (Embrapa). 🐣What it is for: in nature, the hen rotates her eggs from time to time during the period in which she is hatching. The chalaza prevents it from moving to one of the poles of the egg during the development of the chick, which would harm its growth and birth. It does not lose its usefulness in eggs for consumption – which have not been fertilized. In this case, the chalaza has the function of positioning the gem centrally, supporting the structure and protecting it against mechanical impacts. 🍳You can eat: chalaza is rich in protein, so it can be consumed. Furthermore, it has practically the same nutritional composition found in egg whites, explains Helenice. 🥚Fresh egg: initially, the chalaza structure connects the two ends of the egg and has twisted white threads. The more preserved this structure is, the fresher the egg is, with its shelf life still recent. 🩸Red stain on the egg: this type of stain is not chalaza, but blood originating in small blood vessels, which detach from the oviduct (channel where the egg passes) and the bird’s ovaries during egg formation. The presence of these stains does not mean that the product is spoiled, but it is important to always cook them before consumption. Read also: Chicken that produces organic eggs has the right to a sand bath, controlled diet and chooses its nest Free-range, organic, ‘cage free’ eggs: know how to differentiate the types (spoiler: it’s not based on the color of the shell) How to know if the egg it is good? g1 tests TikTok ‘tricks’ See what egg production is like in Brazil: Where does what I eat come from: Eggs Free-range, organic, conventional and enriched eggs: g1 explains the differences How do you know if the egg is good? g1 tests tricks that are popular on social media

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