Nanton Nutraceuticals products are all natural, backed by scientific research, and have no side effects. Our main active ingredient, Rhoziva, is completely safe, all natural, well tolerated and has NO dependency side effects. In the creation of Rhoziva, we adhere to and surpass all government quality control testing standards and protocols. Nanton Nutraceuticals is the only company in North America to not only produce Rhoziva™, but grow our own crop of Rhodiola rosea. Rhoziva™ has the highest safety and quality assurance of any Rhodiola rosea product on the market.