Shrimp heads are edible after cooking at a high temperature of 100°C or more, but are generally not recommended. Although shrimp heads also contain protein, the presence of harmful substances with a higher content than the nutrients, so it is recommended to avoid eating shrimp heads, which may bring discomfort to the body after consumption in large quantities.1. Organs in shrimp heads: shrimp heads not only contain many unformed eggs, but also many of the shrimp’s own waste toxins, because many of the internal organs of shrimp are in the shrimp head, such as the stomach, liver, heart, kidneys, ovaries or seminal vesicles, excretory The head of the shrimp, the antennal glands, as well as the bladder and excretory pores, etc., so the part of the shrimp head is the main part of the shrimp digestion, absorption, metabolism, plus shrimp like to live in unclean water, if the shrimp in the ingestion of food, the consumption of putrefactive substances may be stored in the shrimp stomach, and not be digested and metabolized food is also a good place for a variety of corrupt bacteria. A large number of consumption can lead to discomfort in the body’s digestive system, such as nausea, vomiting, bloating, abdominal pain, etc., if not handled seriously may also occur food poisoning; 2, heavy metals in shrimp head: shrimp are aquatic products, in order to maintain their own life activities, the need to obtain nutrients from the outside world, if the shrimp survival of water or feed is contaminated, the stronger its ability to take in nutrients, the more toxins ingested. And shrimp head is the main metabolic site, its heavy metal content (lead, mercury, etc.) overall higher than the shrimp body, in order to reduce the intake of harmful substances can be directly removed from the shrimp head to eat.