Why are some black walnut kernels white and some black?

　　Many people find that walnuts vary greatly when buying them, including the kernels inside, which can be black or white. White kernels indicate earlier, naturally ripened walnuts, but the outer shell tastes slightly astringent. Black kernels, on the other hand, were picked before they were fully ripe and have a black outer shell, commonly known as black-kernel walnuts. However, they are very sweet.

　　There can be a big difference, but it's better to choose black-fleshed walnuts. The color is more reliable and there are no other additives. There is a green skin on the outside of the hard shell of a walnut. If the walnut is not processed in time after being knocked down, the hard shell of the walnut will be dyed black. Sometimes the walnut is not mature enough, and the green skin is difficult to remove.

　　Are black walnuts or white walnuts better?

　　Black walnuts are slightly better, while white walnuts often contain more additives. However, the main differences are not significant. It's still important to pay attention when buying walnuts, as there isn't much difference between black and white walnuts; they are both types of walnuts. Walnut kernels are a very good nutritional supplement, containing protein, fat, carbohydrates, and dietary fiber.

　　Walnuts are highly nutritious, primarily helping to improve brain function. However, walnuts also contain other beneficial components. Choosing walnuts with a rich, vibrant color is best. Whether black or white-skinned, the nutritional value of walnuts is roughly the same. After buying and comparing many, I find white walnuts taste better. However, avoid buying overly white walnuts, as some believe they may have been washed with chemicals.