0 calories per 1 tsp. See nutrition information for sodium content. Heinz 57. Estd.1869. No. 1 grade mustard seeds. 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. Heinz Yellow Mustard offers the trusted, flavorful taste of classic Heinz Mustard that complements a wide range of foods. Try our yellow mustard on a burger, hot dog, or sub sandwich. Made with 100% natural ingredients including #1 grade mustard seeds, this natural mustard delivers the classic yellow mustard taste you know and love. This deliciously prepared yellow mustard will elevate any meal you add it to, and will surely be a hit with the entire family. The 14-ounce upside-down squeeze bottle makes it easy to use without the watery mess. Whatever the occasion, Heinz Yellow Mustard delivers the rich and tangy flavor the whole family will love.