However, the flavanols, notably catechin, epicatechin, procyanidin B1 and other procyanidins, were also found in the fruit flesh with meancontents in the flesh of peaches and nectarines in the range 100–700mgkg-1 with a tendency for contents to be higher in white flesh peach cultivars than in yellowflesh cultivars.3,27 Plums contain higher levels of epicatechin than catechin, withthe total levels of these flavanol diastereoisomers being 5–50 mg kg-1 fresh weightof whole plums.28 More recent values for the total amount of flavanols, whichinclude procyanidins, in the plum flesh alone are in the range 140–600mgkg-1fresh weight (Table 3.1).3 The higher values obtained in the more recent investigations3 may be a result both of a more comprehensive extraction technique aswell as use of better analytical methodology.
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