The method herein describes a process for the preparation and extraction of components from plants of the family Rubiaceae indigenous to South America, also known as Cat's Claw or Uña de gato. Cat's claw is an ethnomedicine that contains a variety of constituents, some of which have opposing actions. Oxindole and pentacyclic alkaloids have been proposed to be constituents that stimulate immune function, whereas polar constituents act to suppress immune response. An extract that was devoid of the aforementioned alkaloids would avoid opposing actions that may negate effectiveness or limit therapeutic outcome.
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