phytochemicals Phytochemicals
 
 

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Black Raspberry

Black Raspberry

Rubus occidentalis

What is black raspberry?

Black raspberry originates from the eastern parts of North America. Black raspberry is a deciduous shrub growing up to 3. The thorny stems have leaves consisting of three leaflets (on flowering branchlets) or five leaflets (on first year stems). The flowers are hermaphrodite and are pollinated by insects. Fruiting only occurs on two-year old stems. The typical round shaped berries are eatable and delicious, however many people do not like the numerous seeds inside the berry. The black cranberry differs from the more popular red raspberry by their more thorny stems and darker colour. Black raspberries fruits looks more like blackberries. Black raspberries detach easily form the carpel, whereas blackberries are firmly attached to the carpel.

Parts used

Black raspberry fruits (raspberries), stems and leaves.

Phytochemicals

These are typical phytochemicals found in black raspberry: the black raspberry contains high levels of nutrients and chemopreventive vitamins and phytochemicals, including beta-carotene, coumaric acid, ellagitannins, anthocyanins, ferulic acid, ellagic acid.

Benefits of black raspberry

Traditionally, the North-Amercian Indians made tea from black raspberry roots used to treat stomach aches. The leaves are highly astringent and used to treat bowel complaints Black raspberry fruits have high levels of anthocyanins, as indicated by their very intense dark colour. The high levels of phytochemicals have initiated many studies into the potential health benefits, such as improving vision, controlling diabetes, preventing cancer and retarding the effects of aging. Most research is focussed on its potential anticancer properties.

Anticancer

In vitro studies have shown that black raspberry phytochemicals inhibit tumor development. A study by Chuanshu Huang and colleagues (Cancer Research, December 1, 2002) have shown that black raspberry methanol extract inhibited the development of esophageal and colon cancer cells. Also Laura Kerty and colleagues (Cancer Research, August 15, 2001) found that intake of lyophilized black raspberry by rats resulted in the progression of the cancer process.

Other names

Virginian raspberry, black-cap berry, black thimble berry

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