A large number of studies have shown that Rhodiola rosea extract has protective and regulatory effects on the human central nervous system, cardiovascular system and endocrine system, especially in anti-fatigue, anti-depression, anti-tumor and improving human immunity. Why is the highest medicinal value about Rhodiola Rosea L in the different Rhodiola species? It is because that the special active ingredient is Rosavins in our product Nature Rhodiola Rosea Extract 3% Rosavins. Our product is GMO Free, Non-Irradiated/Non-ETO/Treat by Heat Only, None Allergens and cross-contamination and None BSE/TSE. Any inquires will get our highly attention & prompt reply.