Bioavailability and Vascular Effects of Apple Polyphenols

2014-08-27 03:14:51 | BioPortfolio


The main purpose of this study is to determine the oral bioavailability of flavanols (polyphenolic compounds) from apple granules and an apple extract delivered in a water based beverage at two different doses. We will also investigate the effects of apple flavanols on nitric oxide production.


This study is a randomized four phase crossover trial investigating the bioavailability of apple flavanols and the effects on nitric oxide products, a surrogate marker for changes in endothelial function. Each test phase will comprise a 3 day period of intervention which will be identical in nature (except for the test product consumed) and separated by a minimum of 1 week. On days 1-3 of each test phase volunteers will consume a low flavanol diet. After consumption of the test product on the morning of day 2, blood and urine samples will be collected at regular intervals for the next 24h.

Study Design

Allocation: Randomized, Endpoint Classification: Bio-availability Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Basic Science




Apple extract delivering 70 mg epicatechin, Apple extract delivering 140 mg epicatechin, Apple granules delivering 70 mg epicatechin, Water delivering no epicatechin


Institute of Food Research
United Kingdom


Not yet recruiting


Institute of Food Research

Results (where available)

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Published on BioPortfolio: 2014-08-27T03:14:51-0400

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Medical and Biotech [MESH] Definitions

A dehydrated extract of thyroid glands. After the removal of fat and connective tissue, the extract is dried or lyophilized to yield a yellowish to buff-colored amorphous powder containing 0.17-0.23% of iodine.

An antioxidant flavonoid, occurring especially in woody plants as both (+)-catechin and (-)-epicatechin (cis) forms.

A dehydrated extract of thyroid glands from domesticated animals. After the removal of fat and connective tissue, the extract is dried or lyophilized to yield a yellowish to buff-colored amorphous powder containing 0.17-0.23% of iodine.

Methods of delivering drugs into a joint space.

A plant genus in the family ROSACEAE, order Rosales, subclass Rosidae. It is best known as a source of the edible fruit (apple) and is cultivated in temperate climates worldwide.

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