(18-09-2014, 08:40 AM)Lotus Wrote: The following info is evidence of the 5 Ar 's of WP.
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The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:-

Chemistry
The leaves of many cultivars are high in oleanolic and ursolic acid.[10]

Leaves and roots can have different compositions. Nettle is an example: the leaf is anti-inflammatory while the root has hormonal effects. The rudimentary analysis of peony root you provided does not mention oleanolic acid. Reference [10] is this paper and it only reports oleanolic acid levels in leaves and stems. Here's a quote from the paper: "Previous studies of herbaceous peony were mainly focused on the root [3,4,11,12,14,31], with monoterpenes as the main compounds. There were few reports about the characterization and quantification of OA and UA in the aboveground parts of herbaceous peony." Therefore, you cannot assume that peony root extracts will have clinically-relevant concentrations of oleanolic acid.