I avoid these primarily because the Bible forbids the consumption of such foods because they can be harmful to your health. Shellfish like Clams, Oysters, Muscles, etc, I avoid because they act as filters for the Ocean. They filter toxins and waste from Ocean water and would therefore contain many toxins that lurk in the Ocean that can be harmful to your health. I also avoid foods like Lobster, Crab, and Shrimp because they are forbidden also.