De Boer et al. DNA metabarcoding of orchid-derived products reveals widespread illegal orchid trade. Proceedings of the Royal Society B. DOI: 10.1098/rspb.2017-1182. Electronic Supplementary Material (ESM) Table S1

Salep samples were randomly purchased to represent commercially available salep products with the objective to assess the level of adulterated and true orchid based products. The sampling includes a representation of producers and vendors, e.g., supermarkets, herbal stores, pharmacies, and markets.