Contains egg but avoids the anchovies that are in all Worcestershire Sauces. (Read the label) Most restaurant dressings have anchovies, and if not most waitstaff are unaware that Worcestershire Sauce has anchovies. Also most hard cheeses are made with animal rennet so check that Parmesan. In Colorado, King Soopers deli has non-animal rennet Murray's Sartori Sarvecchio Parmesan. No cheese in dressing but consider this when you top your salad with Parmesan. Home made croutons are also the best - see additional recipe.