Epimedium extract, according to Wikipedia, has many other names, such as Horny Goat Weed, Yin Yang huo, Rowdy Lamb Herb, Bishop's Hat, Barrenwort, Fairy Wings, etc. Many people may take icariin or icariins for epimedium extract. Make sure that icariin is the main active ingredient in epimedium plant. The current epimedium extract is dominantly standardized for icariin only. Spec ranges from1% to 98% hplc. If you are not sure about the differences between icariin and icariins, you may send inquiry to us for help. Of course, we can manufacture the epimedium extract according to your specific requirement.