Figure 1.

Types of functional foods, bioactive ingredients, and common products. This schematic of concentric circles shows the title in the innermost circle followed by a circle containing the current concepts, reflecting 10 condition-specific broad categories of functional foods. The penultimate circle illustrates the primary active components used to create the aforementioned ten types of functional foods. Typical examples of well-linked functional foods in each category are shown in the outermost circle. PUFA: polyunsaturated fatty acids.