1 Heat-clearing and summer-relieving duck eggs are cool, and they have the function of nourishing yin and clearing lung-fire, while salted eggs have a better effect of clearing lung-fire. It is recorded in The Compendium of Medical Forest that "salted eggs can relieve summer-heat, facilitate urination, strengthen large intestine, treat dysentery and stop diarrhea", so eating salted eggs in summer heat also has the effect of clearing away heat and relieving summer-heat, which is suitable for people with yin deficiency and fire.

2 diuretic and antidiarrheal salty eggs are cold, enter the kidney meridian, have diuretic effect, and can be used to treat dysuria and edema. Salted eggs are pickled food, which has astringent taste after pickling, can astringe the intestines to stop diarrhea, cook salted eggs and eat them, and also treat diarrhea.

3 The yolk of the salted egg for clearing liver and improving eyesight is rich in vitamin A and carotene, both of which contribute to the function of the liver, so the salted egg also has the effect of clearing liver and improving eyesight.

4 Improve memory Salted egg yolk can release choline after being absorbed by the human body, and choline can improve the memory of the brain. It is because choline directly enters the brain and combines with acetic acid to produce acetylcholine which is helpful to improve memory.