There are freshwater shrimp and shrimp in the sea. Whether it is a kind of nutrition is very rich, many people will have such a doubt, shrimp will be boiled or the temperature is too high will change color, this article will be a detailed solution for everyone problem.
Why shrimps turn red
There are various pigment cells in shrimp shells, but there are many cells containing astaxanthin. After steaming or dying shrimps, their bodies turn orange-red, because most of the pigments are destroyed under high temperature and decomposed. Only the astaxanthin is orange-red when it has not been damaged. Wherever there is a lot of astaxanthin, such as the back, it appears red; and where there is little astaxanthin, such as the lower part of the appendage, it becomes lighter.
Why can't eat shrimp head?
It's best not to eat. Eating shrimp head equals to eating shrimp excrement, half-digested shrimp food, and more importantly, the shrimp head will enrich the heavy metals in the environment.
The heavy metal content varies with its size and location. The trend is that the heavy metal content of large-size samples is relatively high, and the growth of heavy metal content in tilapia and Penaeus vannamei has a positive correlation with its body weight; Tilapia has a significant content of heavy metals in the viscera. Higher than muscle tissue, shrimp head is the main site for heavy metal enrichment in shrimp.
However, there is indeed a very delicious ingredient in the shrimp head, which is the shrimp's egg, commonly known as "yellow."
During the mature period, the female shrimp will contain shrimp yellow at the head and neck, so shrimp with yellow shrimp must be female, but no yellow shrimp is not necessarily male, and female shrimp do not have yellow shrimp. The common people are less familiar with shrimp yellow shrimp, shrimp in shrimp before the egg contains shrimp head and neck, commonly known as "red head".
Can shrimp shell eat?
Can eat, but nutrition is not easy to absorb. The calcium content in shrimp shells is high, but the absorption rate is not ideal. Even a soft shrimp shell is not completely chewed by human teeth. After being dissolved in the stomach by stomach acid, only a small portion of it can be dissolved. Unless the shrimp shell is ground into a shrimp shell powder, combined with vitamin D intake, will have a certain effect of calcium.
Steps to eat shrimp
The first step: purchase
When selecting the shrimp, it is necessary to observe carefully. The back of the shrimp is bluish-black. It is a fresh expression. Generally, it is better to have individual integrity, without crustacea, strong flexion of the tail section, and a sense of dryness on the surface. Also, be careful about buying frozen crayfish from unknown sources or processed shrimp tails because these products may not be too fresh.
Tips: shrimp is not the bigger the better shrimp shrimp is the most nutritious
The second step: cleaning
After returning home, put the shrimp in clean water and soak it for 1~2 hours, and then remove it one by one.
Step 3: Organize
Cut off most of the head shells and use scissors to pick out the black stomach pouch where the exposed head is attached to the back. Pull the tail arm of the tail of the shrimp and pull the gut out; cut a knife on the back to make it tasty.
Step 4: Cooking
Because shrimp contains bacteria, be sure to cook it until it is cooked. The summer weather is hot and easy to get angry. It is best to use steamed cooking methods.
Step 5: Eat shrimp
When eating shrimp, it is best to add ginger and vinegar, which can increase the temperature of the solution, increase the temperature, help the digestion, and have a more bactericidal effect. After the shrimp is cooked, it should not be stored. It is best to eat it once.
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