1, why is steamed crab not yellow?

When handling crabs, in order to prevent full crab roe from flowing out, the general practice is:

When choosing crabs, choose fresh ones with intact claws and strong activity. If crabs are not particularly fresh, sometimes crab roe will flow out when steaming, mostly light crab roe juice.

Fix the claws of crabs with rubber bands or strings to prevent them from crawling;

Key points: when steaming crabs in the pot, put the crab's stomach up and back down, so that the heat is even and the mature crab roe stays in the shell;

Water accumulates at the bottom of the steamed crab pot. Not too much, at least two centimeters away from the drawer, because too much water will cause the crab to jack up when the water is boiling, and even the crab yellow should be cooked;

The steaming time is generally controlled within ten minutes and should not be too long. Because crabs, whether sea crabs or river crabs, are not suitable for cooking for too long, and if they are cooked for too long, they will lose their delicious taste with steam.

2. The nutritional value of crab roe.

The ovaries and digestive glands in crabs are orange and delicious. Crab yolk is not a crab egg. Although its composition is basically the same as crab roe, there are essential differences between them. Crab yolk does contain eggs that have not been excreted, but there are other crab organs, glands, tissue fluids and other substances, not just crab eggs. When the crab roe becomes large and bright orange, it shows that the gonad of the female crab has matured. At this time, crab eggs are produced and excreted, and the egg cells left in the gonads in the body still belong to crab yellow.

Crab yellow is rich in nutrients such as protein and phospholipids, but it also contains high content of oil and cholesterol. Crab yolk can be made into many delicious foods: crab yolk porridge and so on. There is also a famous delicious snack on the beach-crab powder cage. As the name implies, the main ingredient is crab roe. There are two kinds of crab yellow: river crab yellow and sea crab yellow.

3. The taboo of crab yellow.

There is still a lot of cholesterol in crab roe. The cholesterol content in eggs is generally above 200, and crab yolk is higher than eggs. The cholesterol content in crab roe per100g may be as high as 400 mg or more, while the cholesterol in crab roe per100g is about 60-70 mg, so patients with vascular diseases such as hypertension, hyperlipidemia, arteriosclerosis and coronary heart disease should not eat crab roe.