The solvent for identification (LC/MS Q-TOF) and quantitative (UPLC-PDA) analysis of polyphenols (anthocyanin, flavan-3-ol
, flavonol, and phenolic acid) were performed as detailed described previously by WojdyJo et al.
content ranged from 48 g to 76 g CE per 100 g.
2013) indicate that the dietary intakes of flavonoids, namely flavonols, anthocyanidins, proanthocyanidins, flavones, flavanones, isoflavones and flavan-3-ols
shown in Fig.
Wines made from hybrid grapes contained significantly more flavan-3-ols
, probably due to the higher seed to fruit ratio of hybrid grapes.
Hurrell, "Identification of apples rich in health-promoting flavan-3-ols
and phenolic acids by measuring the polyphenol profile," Journal of Food Composition and Analysis, vol.
In this particular study participants with type 2 diabetes mellitus (DMII) took a daily dose of 27 mg of flavonoid enriched chocolate (90 mg epicatechin, 850 mg total flavan-3-ols
) and 100 mg of soy isoflavones for 12 months.
Quercetin glucuronide, myricetin xyloside and flavan-3-ols
in polymeric form were tentatively identified for the first time in murta extracts.
The presence of flavan-3-ols
has been reported in cranberry by Lin and Harnly (2007).5 Through reactions catalysed by light, heat and oxygen, flavan-3-ols
tend to combine with esters of gallic acid and ellagic acid to form compounds referred to as hydrolysable tannins, such as catechingallate, epigallocatechin, epicatechin gallate, gallocatechin and epigallocatechin gallate.
Researchers examined the relationship of the six main subclasses of flavonoids commonly consumed in the American diet-flavanones, anthocyanins, flavan-3-ols
, flavonoid polymers, flavonols, and flavones--to the risk of ischemic, hemorrhagic, and total stroke.
Polyphenols in grape seeds are mainly flavanoids, including gallic acid, the monometric flavan-3-ols
catachin, epicatechin, gallocatechin, epigallocatechin, and epicatechin 3-O-gallate, and procyanidin dimmers, trimers and more highly-polymerized procyanidins.
When the flavonoids were broken down into specific types, the significant reduction in breast cancer risk applied to flavones, flavan-3-ols
, and lignans only; not to flavanones, isoflavones, or anthocyanadins.
It's rich in antioxidants, and contains chemicals called flavan-3-ols
, which are linked to lower blood preesure and blood vessel health.