Day after day the number of persons affected by breast cancer and prostate cancer increases. In the USA breast cancer is among the most common cancers. In male population prostate cancer is its equivalent in number of occurrences. The study presented in this article shows some hope on the treatment of those two common types of cancer by using pectin, a heteropolysaccharide found in citrus fruits, specially on citrus peels, where the content of pectins can reach up to 30%. Other fruits rich in pectin are carrots, oranges, apples and apricots(2).