Free-range eggs refer to eggs laid by free-range chickens raised on farms, while caged eggs, or commercial eggs, refer to eggs laid by chickens raised in factories or by specialized chicken farmers using synthetic feed.
Free-range eggs contain no artificial antibiotics, hormones, or pigments. Compared to regular eggs, the albumen is thicker, the protein content is 5-6% higher, the fat content is 3% lower, and the cholesterol is 19.8% lower. They have a fragrant and fresh taste, a tender texture, and no fishy smell.
Free-range eggs are rich in nutrients and are an important ingredient in beauty diets for women. One egg a day is not excessive.
If your blood cholesterol is not high, there is no need to deliberately discard the yolk. Eggs are the highest quality protein source among all foods. Eggs contain high-quality protein with the highest biological availability of any natural food.
A woman's beauty, hair, and skin all need sufficient protein to maintain their condition, and eggs are the simplest, most convenient, and most balanced source of protein.
In addition, the yolk also contains various B vitamins, vitamins A, D, and E, and yolk oil has anti-aging properties.
When you crack the shell, the free-range egg's albumen is clear and thick, slightly tinged with a bluish-green. The yolk is golden in color, floats on top of the albumen without sinking, and a toothpick inserted into the center of the yolk can stand upright. Its shell is tough and thick, rich in calcium, and not as brittle and thin as that of commercial eggs.
When you peel a cooked free-range egg and squeeze it in your hand, even if the egg is flattened, the albumen will not crack, and it remains a whole egg. The yolk of a commercial egg is slightly larger and pale yellow.
Furthermore, eggs laid by chickens whose feed contains colorants have red yolks and are often sold as free-range eggs. Although they are similar, they can still be distinguished: first, the shells of the former are rougher; while free-range eggshells are finer and harder.
Second, the yolks of feed eggs are entirely red, while free-range eggs can have both red and yellow yolks. This is because only chickens that eat certain special grass seeds will produce eggs with red yolks.
Third, the albumen of feed eggs is thin and watery, and the yolk is smaller; the albumen of free-range eggs is thick, clear, and sticky.
After several comparisons and accumulating experience, it becomes easy to tell the two types of eggs apart.
1. From the appearance, free-range eggs are slightly smaller and lighter in color, and fresher ones have a thin white film. Commercial eggshells are darker in color.
If you are still not sure, you can crack the egg after purchasing; a golden yolk indicates a free-range egg; a pale yellow yolk indicates a commercial egg. After a few comparisons, you will gain experience and will be able to easily distinguish between the two types of eggs in the future.
2. Real free-range eggs are indeed more delicious than any kind of egg sold on the market. A real free-range egg, even when simply boiled in plain water, is very delicious.
3. Although free-range eggs are smaller in size, their yolks are no smaller than those of commercial eggs. Commercial eggs are larger with more albumen—more water—which is evident when frying them; they make a sizzling sound when they hit the hot oil.
4. The albumen of a free-range egg is clear and thick, slightly tinged with a bluish-green, and the yolk is golden in color, floating on top of the albumen without sinking. A toothpick inserted into the center of the yolk can stand upright. Its shell is tough and thick, rich in calcium, and not as brittle and thin as other eggshells. When you peel a cooked free-range egg and squeeze it in your hand, even if the egg is flattened, the albumen will not crack, and it remains a whole egg.
5. Look at the brightness and cleanliness of the eggshell. If the surface is very shiny and smooth, it means it has been stored for a longer time. Fresh eggshells have a stronger three-dimensional texture.
Pick up the egg and shake it gently next to your ear; a sound indicates it is not fresh. Place the egg in a dark place and shine a small flashlight on the larger end; the smaller the air cell (the space inside the egg), the fresher it is.