Proanthocyanidins are a class of polyphenols found in many plants, such as cranberry, blueberry, and grape seeds. Chemically, they are oligomeric flavonoids. Many are oligomers of catechin and epicatechin and their gallic acid esters. More complex polyphenols, having the same polymeric building block, form the group of tannins.
Proanthocyanidins were discovered in 1947 by Jacques Masquelier, who developed and patented techniques for the extraction of oligomeric proanthocyanidins from pine bark and grape seeds.[1] Proanthocyanidins are under preliminary research for the potential to reduce the risk of urinary tract infections (UTIs) by consuming cranberries, grape seeds or red wine.[2][3]
^Schwitters, Bert (1995). OPC in Practice. Publishing rights search incomplete. p. 15. ISBN 978-8886035132.
^"Scientific Opinion on the substantiation of a health claim related to CranMax® and reduction of the risk of urinary tract infection by inhibiting the adhesion of certain bacteria in the urinary tract pursuant to Article 14 of Regulation (EC) No 1924/2006". EFSA Journal. 12 (5): 3657 (11 pgs). 2014. doi:10.2903/j.efsa.2014.3657. A cause and effect relationship has not been established between the consumption of CranMax® and reduction of the risk of urinary tract infection by inhibiting the adhesion of certain bacteria in the urinary tract
^Williams, Gabrielle; Stothart, Christopher I.; Hahn, Deirdre; Stephens, Jacqueline H.; Craig, Jonathan C.; Hodson, Elisabeth M. (2023-11-10). "Cranberries for preventing urinary tract infections". The Cochrane Database of Systematic Reviews. 2023 (11): CD001321. doi:10.1002/14651858.CD001321.pub7. ISSN 1469-493X. PMC 10636779. PMID 37947276.
Proanthocyanidins are a class of polyphenols found in many plants, such as cranberry, blueberry, and grape seeds. Chemically, they are oligomeric flavonoids...
Proanthocyanidin B3 may refer to: Procyanidin B3, a catechin dimer Prodelphinidin B3, a gallocatechin-catechin dimer This set index article lists chemical...
Procyanidins are members of the proanthocyanidin (or condensed tannins) class of flavonoids. They are oligomeric compounds, formed from catechin and epicatechin...
Procyanidin A2 is an A type proanthocyanidin. It is found in avocado, chestnut, cranberry juice concentrate, lychee fruit pericarp, peanut skins, Cinchona...
Procyanidin C1 (PCC1) is a B type proanthocyanidin. It is an epicatechin trimer found in grape (Vitis vinifera), unripe apples, and cinnamon. Procyanidin...
Procyanidin B2 is a B type proanthocyanidin. Its structure is (−)-Epicatechin-(4β→8)-(−)-epicatechin. Procyanidin B2 can be found in Cinchona pubescens...
Classification System Bradykinin receptor B2, a human gene Proanthocyanidin B2, a B type proanthocyanidin Thromboxane B2, an inactive metabolite/product of thromboxane...
type Arecatannin B1, a tannin found in the betel nut Proanthocyanidin B1, a B type proanthocyanidin Vitamin B1, also known as thiamine B1 TV, a Romanian...
Proanthocyanidin dimers are a specific type of proanthocyanidin, which are a class of flavanoids. They are oligomers of flavan-3-ols. Dimeric B-type proanthocyanidins...
B type proanthocyanidins are a specific type of proanthocyanidin, which are a class of flavanoids. They are oligomers of flavan-3-ols. These molecules...
B4 receptor 2, two human genes Lipoxin B4, a lipoxin Proanthocyanidin B4, a B type proanthocyanidin Vitamin B4, an alternate name for adenine A stellar...
patients with irritable bowel syndrome. It is a purified oligomeric proanthocyanidin from "dragon's blood", the sap of the South American tree Croton lechleri...
rutin, stigmasterol, ursolic acid) and proanthocyanidin B1 and proanthocyanidin B2, B type proanthocyanidins, in the root. Uncaria guianensis on liberherbarum...
flower extract contains anthocyanins, green developing seeds contained proanthocyanidin, and linolenic, α-linolenic, oleic and palmitic acids are present in...
dry weight, anthocyanin content is 1480 mg per 100 g dry weight, and proanthocyanidin concentration is 664 mg per 100 g fresh weight. These values are among...
from Pinus densiflora were found to contain 30.54 milligram/gram of proanthocyanidins when extracted with hot water. Comparative to ethanol extraction resulting...
Procyanidin B5 is a B type proanthocyanidin. Procyanidin B5 is an epicatechin-(4β → 6)-epicatechin dimer. It can be found in grape seeds, in Hibiscus cannabinus...
DL-epicatechin. Catechin and epicatechin are the building blocks of the proanthocyanidins, a type of condensed tannin. Diastereoisomers gallery (+)-catechin...
RL; et al. (December 2004). "Characterization of anthocyanins and proanthocyanidins in some cultivars of Ribes, Aronia, and Sambucus and their antioxidant...
Procyanidin B4 is a B type proanthocyanidin. Procyanidin-B4 is a catechin-(4α→8)-epicatechin dimer. It is found in the litchi pericarp, in grape seeds...
dimer. It is a molecule with a 4→8 bond (epicatechin-(4β→8)-catechin). Proanthocyanidin-B1 can be found in Cinnamomum verum (Ceylon cinnamon, in the rind,...
12395) is a B type proanthocyanidin. Ent-epiafzelechin-3-O-p-hydroxybenzoate-(4α→8,2α→O→7)-epiafzelechin) is an A-type proanthocyanidin found in apricots...
Procyanidin B8 is a B type proanthocyanidin. Procyanidin B8 is a catechin-(4α→6)-epicatechin dimer. It can be found in grape seeds and in beer. Procyanidin...
576.126776 u) may refer to : Proanthocyanidin A1, an A type proanthocyanidinProanthocyanidin A2, an A type proanthocyanidin This set index page lists chemical...
Procyanidin A1 is an A type proanthocyanidin dimer. It is an epicatechin-(2β→7,4β→8)-catechin dimer found in Rhododendron spiciferum, in peanut skins and...
pinaster which is used as a dietary supplement. It is composed mostly of proanthocyanidins. Pycnogenol is a trademarked name for a standardized preparation that...
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