How does fingernail circumjacent desquamate return a responsibility?

summary

Peeling around fingernails is a sign of vitamin C deficiency. Vitamin C is a powerful reducing agent, which is reversibly oxidized and reduced in vivo, so it plays the role of redox in cells. It is related to the metabolism of phenylalanine and tyrosine. How does fingernail circumjacent desquamate return a responsibility? Let's talk about it

How does fingernail circumjacent desquamate return a responsibility?

Insufficient intake, such as proper nutrition of pregnant mother, appropriate vitamin C reserve at birth, cord blood plasma vitamin C content is 2-4 times higher than maternal plasma, so the incidence of infants under 3 months is less. But if the pregnant mother's diet lacks vitamin C, the newborn may also suffer from scurvy. Normal human milk contains about 40-70 mg / L vitamin C (4-7 mg / dl), which can meet the needs of ordinary infants.

When the metabolic rate increases, the requirement of vitamin C increases. When the growth is active, the content of vitamin C in the body decreases sharply. The growth and development of premature infants are faster, and the requirement of vitamin C is relatively larger than that of normal infants, so it should be supplemented more.

Other factors such as long-term intake of large amounts of vitamin C, its catabolism and renal excretion increase to reduce the concentration of plasma vitamin C. If a large amount of vitamin C is stopped suddenly, scurvy may occur. If a large amount of vitamin C is used for a long time during pregnancy, the newborn may still suffer from scurvy even if they take the normal amount of vitamin C every day after birth.

matters needing attention

The high content of vitamin C in milk is one of the reasons to emphasize human milk feeding. The diet of pregnant women and lactating mothers should include foods rich in vitamin C, such as fresh vegetables and fruits, or vitamin C tablets dissolved in water and added with sugar. The requirement of vitamin C is about 80-100mg or more per day, which can ensure that the fetus and infants can get enough ascorbic acid. Zhu Futang (1936) had done the experiment, as long as the daily intake of Chinese cabbage and white radish 0.5kg, the concentration of vitamin C in breast milk can be as high as 60mg / L (6mg / dl).