Use exemplification paragraphs to provide instances that clarify your topic statement. In the following paragraph, the topic sentence is supported in examples that illustrate, support, and clarify the main point.
Vitamins and minerals can be added to enrich (replace nutrients lost in processing) or fortify (add nutrients not normally present) foods to improve their nutritional quality. Breads and cereals are usually enriched with some B vitamins and iron. Common examples of fortification include the addition of vitamin D to milk, vitamin A to margarine, vitamin C to fruit drinks, calcium to orange juice, and iodide to table salt.
--P. Insel and W. Roth, Core Concepts in Health