What specific preparation of Malus sylvestris was historically used for lowering blood pressure?

Answer

Decoctions made from the leaves

Systemic support derived from the crabapple tree historically included specific preparations targeting the circulatory system. Decoctions, which involve steeping plant material in boiling water to create a concentrated liquid, were specifically prepared using the leaves of Malus sylvestris. The intended medical purpose of these leaf decoctions, as recorded in historical uses, was the reduction or lowering of blood pressure, indicating a targeted application beyond just the fruit itself.

What specific preparation of Malus sylvestris was historically used for lowering blood pressure?
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