Mussels are mainly of two types – freshwater and saltwater mussels. You’re more likely to purchase the saltwater type from the market, especially the blue mussel. They are contained in a blue-black shell. The shell is a bivalve, meaning that it has two parts hinged on each other. Mussels may not appear like great food, but they make a good choice for people who want to shed off some weight. This is due to the low-fat content of mussels. Mussels are packed with quality nutrients, from proteins and carbohydrates to vitamins and minerals. Mussels are filter feeders; they live on the population of planktons in the water. Bacteria and toxins are also free to flow in and out of the mussel, and for this reason, it may be unsafe to eat mussels. Cooking or heating can break and destroy these toxins, though some may still remain. 
Mussels are enjoyed in different varieties, smoked, cooked, canned or minced. Mussels’ nutrition provides you with lesser calories than does red meat. Experts suggest the importance of eating mussels well-cooked to avoid causing harm to your own immune system. Let’s take a critical look at the nutritional benefits of eating mussels.