How to Read Food Labels for a Heart-Healthy Diet Partially hydrogenated oil Omega-3 fatty acid Olive oil Butter What's important to know about the first ingredient listed on a label? It's the healthiest. It's in the largest quantity. It's first due to alphabetical order. What words should I look out for that mean sugar? High-fructose corn syrup Agave nectar Dehydrated cane juice All of the above