Nature’s Sunshine (established in 1972) was the first company to commercially encapsulate herbs and has been a pioneer and leader in quality control in the herb industry. NSP tests, tests and retests every ingredient and finished product they manufacture. They test for microbial and chemical contamination and to make sure that the plant material is from the right plant, is the right plant part and has the right profile of constituents (meaning it was properly grown and harvested). One of the only herbal companies to have medical labs and scientists testing all their products