For this product, we carried out independent lab testing and were very happy with the results. so we decided to brand this ourselves. it is 99.7 - 100% purity which is equal to an actual mainstream Licensed Pharmaceutical HGH. It is a pure Pharma-grade white top Somatropin. It is manufactured to GMP standards and subject to 3 monthly batch testing for purity. We encourage any clients who are using Genotropin and are tight on budget to give this a try.