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What is Epilobium Parviflorum?
Small flower willow herb, Epilobium parviflorum SCHREBER [Fam. Onagraceae], is widespread in Central and Eastern Europe and in disturbed areas of North America. Epilobium species have been used as remedies in folk medicine, particularly in Central Europe, for the treatment of prostate disorders and abnormal growths. This pleasant herb and flower tea was highly recommended by Austrian herbalist, Maria Treben, for ailing men with prostate abnormalities. Based on customer feedback to health food stores and companies in Canada and the U.S., small-flowered willow herb extract quickly helps men to recover from the annoying symptoms of prostatitis.
All willow herb species contain flavorglycosides, especially derivatives of kaempferol, quercetin, and myricetin. Epilobium parviflorum also contains b-sitosterol, various esters of sitosterol, and sitosterol glucoside have been detected. These are the compounds considered to be the active ingredients of Saw Palmetto, another major herb used for treating the prostate. Gallic-acid derivatives are also present. Gallic acid and ellagitannins are considered to be the actives associated with the drinking of green tea. Two of these macrocyclic ellagitannins, oenothein A and oenothein B, have been identified as the main constituents responsible for the inhibition of 5-alpha-reductase and aromatese enzymes. These enzymes are considered to play key roles in the cancer of the prostate.
Preliminary (in vitro) studies at the Prostate Center of Vancouver found that very low concentrations of an extract from small-flowered willow herb tea, in the micrograms per ml level, was among the most active ever seen against abnormal cells and growths of the prostate. Several extracts from Epilobium parviflorum, were evaluated in biochemical assays with 5-alpha-reductase and aromatase, two enzymes involved in the etiology of benign prostatic hyperplasia (BPH). Aqueous extracts displayed inhibition of these enzymes and the active compounds identified were macrocyclic ellagitannins, oenothein A1, B1 and B2, which can make up to 14% of crude plant extracts. Out of a total of 92 plant phenolic extracts tested, small-flowered willow herb was also found to have high antioxidant activity. Small-flowered willow herb tea is also recommended for treating urinary tract infections in women. In one study, both the large-flowered willow herb (Epilobium angustifolium) and small-flowered willow herb E. parviflorum were found to reduce inflammatory prostaglandins in the carrageenin-induced rat paw edema test; in this study, E. angustifolia was found to be 5 times more powerful than E. parviflori. Antimicrobial screening of 13 phenolic substances and 29 extracts prepared from Finnish plant materials against selected microbes found that willow herb (Epilobium angustifolium L.) was one of the most active plant extracts tested against bacteria.
Active Ingredients: As far as known, all willow herb species contain flavonoids, especially derivatives of kaempferol, quercetin, and myricetin. In E. parviflorum and E. angustifolium, b-sitosterol, various esters of sitosterol, and sitosterol glucoside have been detected. Gallic-acid derivatives may be present. Two macrocyclic ellagitannins, oenothein A and oenothein B, have been identified as the main constituents responsible for the inhibition of 5-alpha-reductase and aromatase enzymes. Quantitation of oenothein B in 10 different species of Epilobium has shown that amounts of up to 14% in the crude plant extracts are possible. [Ducrey B, Marston A, Gohring S, Hartmann RW, Hostettmann K. 1997. Inhibition of 5 alpha-reductase and aromatase by the ellagitannins oenothein A and oenothein B from Epilobium species. Planta Med 1997 Apr; 63(2): 111-4].
For discovering Provize, we thank Dr. Paul Hornby and his herbal research team in Richmond, BC. Canada. Provize treats benign prostatic hyperplasia (BPH) and Prostatits. as well as promotes prostate health and well being for men.
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