Barlowe's uses the finest quality herbal extracts from the highest quality GMP certified extractors. All bulk shipments to our company are tested for purity utilizing Barlowe's in-house HPLC laboratory. The capsules utilized for our products are sourced from Capsuline and are the highest quality clear vegi-caps. We encapsulate the herbals with slow speed equipment so that we do not have to use stearates, silicates, cellulose, or other flow agents. This yields a totally excipient and adulterant free product. Finally, we bottle the capsules in glass, ensuring a BPH free product. We even use metal bottle caps so that our capsules do not ever come in contact with plastic. All products are subsequently stored in a heavily air conditioned storage room until they are ready to be shipped to the customer.