How to eat fish is the healthiest?

Fish scale is the exoskeleton of fish, which is rich in collagen, calcium, phosphorus, lecithin and other nutrients, and also contains chitin, a dietary fiber. Because collagen will be converted into soluble gelatin at 70℃~90℃, it is commonly eaten as fish scale jelly. Fish bones, also known as fish bones, are rich in trace elements such as calcium. After softening, their nutrients will be more easily absorbed by the human body. Small fish with bones should chew hard. After gastric acid enters the stomach, it will partially soften their bones and promote the dissolution of nutrients such as calcium and phosphorus. The big fish bone sucks its bone marrow, which is the white line in the fish spine. In addition, fish bones can also be boiled in vinegar and simmered for 2-4 hours. It should be noted that it is difficult for fishbones to soften when boiled in white water. Adding more vinegar to stew, using the effect of acetic acid, can promote the softening of fishbone.