Blackberries contain numerous phytochemicals including polyphenols, flavonoids, anthocyanins, salicylic acid, ellagic acid, and fiber.[10][13] Anthocyanins in blackberries are responsible for their rich dark color. One report placed blackberries at the top of more than 1000 polyphenol-rich foods consumed in the United States,[14] but this concept of a health benefit from consuming darkly colored foods like blackberries remains scientifically unverified and not accepted for health claims on food labels.[15]