Hello, crab has a relatively high protein and fat content due to its crab roe paste, etc., and can easily cause allergies. It is recommended not to eat too much. It is hard to say how much you can eat, but what is too much? Everyone knows that they are not good. It is recommended that you only eat three to five at a time. They are nutritious and relatively large. If you have allergies, you should go to the hospital for treatment in time. I wish you good health.