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Natrol founded in 1980, is a 35-year-old Good Manufacturing Practices (GMP) vitamin and supplement manufacturer that has consistently achieved the highest "A" rating from the Natural Products Association, an independent industry association responsible for certifying vitamins and supplements. At Natrol, the quality assurance program is extensive and industry leading. Natrol is committed to ensuring you always get the highest quality, most efficacious and unquestionably pure and safe products. They perform rigorous quality checks throughout the process from exhaustive supplier qualification screening to the sourcing of the best ingredients. Their multiple quality checkpoints throughout the manufacturing process ensure diligent testing of the finished products. They also go above and beyond by performing testing on all of the finished products to ensure all the ingredients are at levels that are efficacious for you all the way through the expiration date. Natrol...Quality Uncompromised. Herbspro.com is proud to carry the entire range of this fine brand.