Is there a scientific basis for nail crescent?

Crescent circle is also called nutrition circle. From the point of view of nutrition, the crescent moon on the nail is a symbol of a person's nutritional level. Generally speaking, people with prominent crescent moon have better gastrointestinal absorption, more nutrition, more energy and nutrition stored in their bodies, and better overall quality in all aspects of their bodies. However, people with small, inconspicuous or no crescent moon have relatively poor gastrointestinal absorption function, average or poor nutrition, relatively less energy and nutrition stored in their bodies, and relatively weak comprehensive quality in all aspects of their bodies. From the perspective of traditional Chinese medicine, the crescent moon is obviously manifested in people's physique, full of blood, muscular, obese, energetic and adaptable to work. However, people with small, inconspicuous or no crescent circle have insufficient blood, dark skin, less meat and relatively weak energy. Under normal circumstances, it seems that the energy is ok, but if the workload is increased, the adaptation effect will not be very good. But this is just physiological common sense, and this situation generally does not affect normal physiological activities, so don't care too much.