Patent ID: 6039950
Filing Date: 2000-03-21
Classification: A61K,G01N

Abstract:
A method for determining a standard bioactivity for a saw palmetto extract comprising:obtaining a sample of alcoholic saw palmetto extract;measuring a total bioactivity for the sample by determining an IC50 in an androgen receptor binding inhibition assay;measuring the total fatty acid content of an aliquot of the whole sample;fractionating the sample and collecting the individual fractions;measuring the fatty acid content of each fraction;identifying the fractions containing linoleic acid ethyl ester and lauric acid ethyl ester;measuring a bioactivity for each of the fractions identified in the step above with an androgen receptor binding inhibition assay;calculating the percent activity of each of the fractions for which androgen receptor binding inhibition has been assayed compared to the total bioactivity of the sample, wherein the molecular weight and amount of the individual fatty acids identified are incorporated into the calculating; anddetermining that if the total bioactivity of the sample is above a selected minimum standard amount, and if the total percent activity of the linoleic and lauric acid ethyl ester fractions is at least 25% of the total bioactivity, then the saw palmetto extract has a standard bioactivity.