Please Note: Although all of the oils we sell are all originally USP grade, they are purchased in bulk containers and re-bottled. The re-bottling process takes place in a very clean environment, with the utmost care for maintaining the product's purity. However, since the re-bottling process does not take place in an FDA certified clean room, these products are technically no longer USP grade. However, we guarantee the original potency of all re-bottled products.