1. Boil crabs without salt. Both river crabs and sea crabs contain a certain amount of salt, so there is no need to put salt when making crabs. If the taste is too light, you can put some other seasonings, or dip the crab meat with soy sauce and vinegar.

2. The nutritional value of crabs. Every100g of crab edible part contains protein17.5g, fat 2.8g, phosphorus182mg, calcium126mg, iron 2.8mg and abundant vitamin A and vitamin B 1.