A method for isolating amyloid inhibitory constituents within Uncaria tomentosa
plant matter. The method includes the steps of extracting the plant matter
with a non-aqueous organic solvent, concentrating the extract, removing insoluble
materials, precipitating amyloid inhibitory constituents with organic solvent,
recovering and redissolving the amyloid inhibitory constituents obtained in organic
solvent, and injecting and separation by HPLC.