American Herbal Products Association guidelines for manufacturers. 9 years ago107 Views http://ahpa.org/News/LatestNews/TabId/96/ArtMID/1179/ArticleID/632/AHPA-Botanical-Ingredient-GMP-Compliance-Workshop-Series-Botanical-macroscopic-and-organoleptic-assessment-of-herbal-ingredients-for-cGMP-compliance.aspx