The Food Database (FOODB) is the world’s largest and most comprehensive resource on food constituents, chemistry, and biology. It is a freely accessible electronic database that provides detailed information about the chemical constituents found in food, designed for applications in nutrition, food science, dietary planning, and general education.  It is searchable by food, but also (for example) by diagnostic LC-MS or GC-MS ions. It holds detailed information about both macronutrients and micronutrients, including many of the constituents that give foods their flavor, color, taste, texture, and aroma.  This includes data on the compound’s nomenclature, description, structure, chemical class, physico-chemical properties, food sources, color, aroma, taste, physiological effects, presumptive health effects (from published studies), and concentrations in various foods. FOODB not only houses data on food compounds but also provides information about the foods containing these compounds.