Worcestershire sauce is a dark colored condiment made from a variety of ingredients including garlic, soy sauce, tamarind, onions, molasses, lime, anchovies as well as seasonings. This is a very popular condiment in the the U.S. but it actually originated in India by the English. An interesting historical note: The sauce was Imported in 1839 by New York buinessman John Duncan, Lea & Perrins® is the oldest commercially bottled condiment in the U.S.
This is a common ingredient and is available in most supermarkets with Lea and Perrins being the most widely sold brand in the U.S.
It can also be purchased online at Walmart.com, Jet.com and Amazon.com: Lea & Perrins Worcestershire Sauce
Check health food stores for a vegetarian version that does not use anchovies. Organic & Vegan Worcestershire Sauce
Is Worcestershire sauce the same as A1 sauce? No, they are completely different products with different formulations. Both can be used as a condiment with meats or added with other ingredients to make a marinade.