Nanton Nutraceuticals uses only Alberta Rhodiola Rosea Growers Organization (ARRGO) grown Rhodiola as its source material.  ARRGO is  an agricultural  cooperative of Alberta farmers and  provides its members with  education, mentoring and ongoing support for the production and sale of high-quality Rhodiola rosea. ARRGO has dedicated itself to growing the best Rhodiola rosea product available through its strict adherence to Good Agricultural Collection Practices (GACP) principles which emphasize  quality at every stage of production. You can visit the ARRGO website here.