A food supplement material, and method of its preparation, containing ellagic acid (i.e., in the form of bio-available ellagitannins), derived from pomegranate plant materials. Most preferably, the food supplement is extracted from pomegranate seed, and contains from about 40% to about 90% ellagic acid (ellagitannins), and is presented for human oral administration as a dry powder contained in gelatin capsules for daily consumption.