Min Shan teapills are produced at The Lanzhou Foci Pharmaceutical Factory, which has met current International GMP (Good Manufacturing Practices) standards for more than a decade. Lanzhou Foci was named one of the top 50 makers of Traditional Chinese Herbs in China among more than 3,000 producers. Founded in 1929, Lanzhou Foci modernized the production of Chinese formulas and used its accumulated knowledge to create the popular Min Shan line of products.Min Shan certifies that its products contains 100% natural Chinese herbs - no preservatives, artificial colors, flavors, refined sugar or pharmaceuticals. Min Shan uses only the highest quality unsulfered herbs and tests each batch for microbials and heavy metals. Min Shan Brand Teapills have long been a staple of the Chinese community''s herbal remedy needs.