0 calories per 1 tsp. See nutrition information for sodium content. Estd. 1869. 100% natural. A common condiment done uncommonly well. Heinz mustard is made with 100% natural ingredients including stone-ground, No. 1 grade mustard seeds. It comes in an upside-down, ready-to-squeeze bottle for a thick and rich mustard with the perfect balance of flavor and tang. heinz.com. Questions or comments? Call 1-800-255-5750.