Black Raspberries contain an extremely dark pigment which allows them to be used as a colorant and gives black raspberries one of the highest antioxidant ratings in common fruits and berries. Rich in ellagic acid, anthocyanins and antioxidants, black raspberries have been called the “king of berries” for their superior health benefits.

Studies at Ohio State University have found significant decreases in colon tumors in rats and esophageal tumors in mice fed a diet with black raspberries. In vitro studies have shown that extracts of raspberries and blackberries may slow the growth of breast cervical, colon and esophageal cancers. Human clinical trials are underway to assess the effects of black raspberries on colon and esophageal cancers in humans.

    The king of berries in terms of health benefits.Has an extremely high overall level of
     phenolic compounds compared to other berries.

    Phenolic compounds such as ellagic acid, gallic acid and rutin contribute to the
    health benefits of black raspberries.

    Contains high levels of anthocyanins, which give them their rich, dark color.
    Anthocyanins work as antioxidants that help fight free radical damage in the body.
    The anthocyanin level of black raspberries is 214-589 mg/100g.

    Antioxidant levels of food is sometimes measured as ORAC (Oxygen Radical
    Absorption Capacity). The ORAC level of black  raspberries is 77 µmoles /TE/g,
    about three times higher than blueberries, a very powerful antioxidant.

    Black raspberries are rich in ellagic acid. Ellagic acid is a phenolic compound
    known to be a potent anticarcinogen, anti-viral and anti-bacterial. The ellagic
    acid level of black raspberries is 5.37 mg/g of dry weight.

    University studies are underway to determine black raspberries' ability to slow
    the growth of certain cancers. In vitro studies show that extracts of raspberries
    and blackberries may slow or reverse the growth of breast, cervical, colon, oral
    and esophageal cancers.

    Studies at Ohio State University showed a 60–80 % reduction in colon tumors in
    rats fed a diet with black raspberries added.
   
    Studies at Ohio State University showed an 80% reduction in esophageal cancers
    in mice fed a 5-10% diet of black raspberries.
   
    Scientists from Ohio State University are now conducting human clinical trials into
    the effects of black raspberries on colon and esophageal cancer in humans.

    Black raspberries continue to generate a high level of interest from research
    scientists due to their potent antioxidant and anti-cancer properties.

    Source: Oregon Raspberry & Blackberry Commission

A black raspberry is a small fruit (botanically an aggregate fruit) that weighs between one and two grams. Almost all commercial production of black raspberries is from developed cultivars of Rubus occidentalis. Oregon accounts for over 90% of black raspberry production in the United States.

More From PubMed.Gov
Composition and antioxidant activity of red fruit liqueurs.
Chemoprevention of esophageal cancer with black raspberries, their component anthocyanins, and a major anthocyanin metabolite, protocatechuic acid.
Characterization of Black Raspberry Functional Food Products for Cancer Prevention Human Clinical Trials.
Berries and Human Health: Research Highlights from the Fifth Biennial Berry Health Benefits Symposium.
Antiviral effects of black raspberry (Rubus coreanus) juice on foodborne viral surrogates.
A black raspberry extract inhibits proliferation and regulates apoptosis in cervical cancer cells.
Unrefined and refined black raspberry seed oils significantly lower triglycerides and moderately affect cholesterol metabolism in male Syrian hamsters.
Anti-inflammatory effects of freeze-dried black raspberry powder in ulcerative colitis.
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