You can drink yogurt when eating crabs. There is no toxic side effect between them, and it will not cause harm to human body. And from the point of view of nutrition, both crab and yogurt have high nutritional value. The main nutrients of crab are protein and amino acids, and the main nutrients of yogurt are lactic acid bacteria, which can promote gastrointestinal peristalsis. So when eating crabs, you can drink yogurt as a drink. However, crabs are cold, and people with weak spleen and stomach should not eat more, otherwise it will aggravate the coldness.