Launched in 2005, use of the stamp surpassed the 4,000-product mark in July 2010.
Oldways and WGC Program Manager Kara Berrini said: “The rapid growth of the Whole Grain Stamp signifies that whole grains really are the new norm for consumers, and the Stamp makes it easy for them to find significant sources of whole grain in products.”
The WGC said that the stamp is also being adopted outside of the United States, and 22 countries now use the program. About 15 percent of products that carry the stamp are sold abroad, it said.
The Whole Grain Stamp program provides manufacturers with two different versions: one that indicates a product is made with 100 percent whole grain and provides a full 16-gram serving of whole grain per portion; and a basic Whole Grain Stamp that requires a product to provide at least eight grams of whole grain per portion, equivalent to a half serving of whole grains.