Beef is composed of countless muscle fibers, the diameter of which is less than one tenth of the thickness of hair, which is almost indistinguishable to the naked eye. However, when a piece of beef is cut along the direction perpendicular to the muscle fibers, the irregular muscle fibers on the cutting surface form a structure optically called grating. Grating interferes with reflected light, which eventually leads us to see all kinds of rainbow-like colors.

Whether beef will produce these iridescence is related to the knife work, the angle of light and the water content of meat. Generally speaking, sauce beef is more likely to produce this phenomenon, so don't panic when you meet beef that glows, just eat it with confidence.

Nutritional Value of Beef Beef contains the highest content of sarcosine in all foods, which can enhance strength and promote muscle growth. At the same time, it can supplement adenosine triphosphate for the body and make people's training more lasting. Beef contains a lot of carnitine, which can support the most basic metabolism of fat and thus produce amino acids, especially suitable for people who want to gain muscle.

Zinc participates in the synthesis of protein, which can promote muscle growth. Zinc, vitamin b6 and glutamate together can strengthen the immune system. Magnesium can enhance muscle strength and improve insulin anabolic function. Iron participates in the synthesis of hemoglobin and is an essential mineral in hematopoietic system.

The above contents refer to People's Daily Online-Light red beef is tender and safe.